Prime is melting my 4770k, oh the humanity. Other options?

Damn. Looks like air isn't viable for this chip then. I'm at stock volts and it'll get too hot. But what does it say about prime (or Intel) when factory speeds and a factory cooler can't keep up..
 
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I'm at 4.5ghz at 1.32V ...I've been gaming pretty much all day on BF4 NFS Rivals etc during the holiday weekend I never crashed no problems...that's my stress test.
 
That makes sense if you are using IBT without manually updating to the latest binaries that Intel releases on a regular basis...

My personal testing method is as follows:

1) Set desired CPU speed and attempt to boot into Windows. If successful go to Step 2. If not, add Vcore and try again..

2) I open IBT and using the "Extreme" preset, and all available ram, run 5 passes. If successful, go to Step 3. IF not, reboot and add Vcore and try again.

3) After 5 IBT runs, I go to 20, again using the extreme preset. (I also load my GPU to 100% to maximize temperatures in my loop). If successful, I go to Step 4. If not, well you know the drill by now.;)

4) After 20 IBT runs, I go into Event Viewer and make sure there are ZERO WHEA ERRORS* showing. If there is, I reboot and add Vcore. If not, I go to Step 5.

5) If everything above is good to go, I then go to a 24hr Prime 95 Torture Test, using Custom Preset..I set Prime to use all available threads, and every MB of memory. I then allow it to run for 24 hrs. If I can't get a stable 24hr run, I retweak and try again..

This! I don't consider any OC stable if it doesn't pass this kind of testing.

I would do as Dan suggests - use manual voltage to stress test. Later you could dial the same voltage with adaptive w/o the outlier tests.
 
This! I don't consider any OC stable if it doesn't pass this kind of testing.

I would do as Dan suggests - use manual voltage to stress test. Later you could dial the same voltage with adaptive w/o the outlier tests.

The loop used for his rig must be insane.

On my H100 running full bore @ 1.255V I hit 100C instantly with IBT.

I really don't want to spend $300-400 on a custom loop right now... but it would look cool.
 
I dont do that much stress testing. I pretty much use OCCT for everything. I run a 4 hour session of OCCT and if it passes thats, its stable. I havent had a single BSOD or crash on an overclock that passes 4 hours of OCCT so for what I use my computer for, thats all the stress testing I need.
 
The loop used for his rig must be insane.

On my H100 running full bore @ 1.255V I hit 100C instantly with IBT.

Is that with fixed or variable voltage?

I dont do that much stress testing. I pretty much use OCCT for everything. I run a 4 hour session of OCCT and if it passes thats, its stable. I havent had a single BSOD or crash on an overclock that passes 4 hours of OCCT so for what I use my computer for, thats all the stress testing I need.

I've had several cases where one test passes for hours and another one fails quickly. Or one fails only after 10+ hours. I don't want to leave any chance for an error to manifest at a wrong moment or find out that something got corrupted months after the fact.
 
I'm at 4.5ghz at 1.32V ...I've been gaming pretty much all day on BF4 NFS Rivals etc during the holiday weekend I never crashed no problems...that's my stress test.

A good 4770K wouldn't need that much voltage for 4.5GHz. That kind of voltage would get you 4.7+ if you can keep it cool enough.
 
Yeah, okay. I tried Prime95 28.1 (small in-place FFT's) and my system failed in like a few seconds. I jacked up the voltage to 1.31 and it ran for about a minute and then bluescreened, but I looked at the sensors and I was honestly afraid of this monster. It managed to make my processor go to 99C like near instantly. What the heck? I was honestly surprised I wasn't smelling burning in there, that's ridiculous.

Apparently for everything I'm doing with my system, 1.305 is fine and my temperatures stay good. Heck I even did a handbrake conversion just now, went through just fine. I don't understand what kind of stability this tool is measuring... I don't think I could remain stable under any settings if this thing makes me go over 99C INSTANTLY at this overclock. o_0

A good 4770K wouldn't need that much voltage for 4.5GHz. That kind of voltage would get you 4.7+ if you can keep it cool enough.

Not everyone has the time (or shamelessness in a way) to go around cherry picking all of their processors until they get one that actually hits what you reviewers do. Unlike you guys, this stuff ain't my life, it's just a side hobby.
 
Damn. Looks like air isn't viable for this chip then. I'm at stock volts and it'll get too hot. But what does it say about prime (or Intel) when factory speeds and a factory cooler can't keep up..

Nahhhhhhh. Air works on 4770k... just have to be realistic and recognize that not all air setups are equal just like some water loops are going to be worse than others. I have one of the worst OC chips I've ever heard of. Use massive positive pressure and a Noctua NH-c14 push pull. 1.25v @4.2Ghz Core/1.23v @4.2Ghz Cache is the best I can get stable period. I haven't run it long enough to get an error on 28.1 but I don't see the point of waiting around for one. My temps are in the 80s up to 90C on small and hottest settings. I don't get crashes in any applications. p95 seems like a "Will my setup EVER throttle?" test.

If your temps are good and you are getting crashes anyway... well...
If your chip is throttling than your stability test is invalid because it isn't passing at the given frequency but one that is variable.
 
Is that with fixed or variable voltage?

Fixed Voltage

I just completed 2 hours of stress testing @ 4.7 with the Intel Stress Tester (within Intel Tuning Utility)

Max temp after 2 hours was 81C.

Settings used were:

Core 4.7 @ 1.300 Adaptive (varied to 1.302 under load)
Cache 4.3 @ 1.235 Static
Input Voltage @ 1.90

I ran Prime95 Large FFT with the above and hit 87C in under a minute and stopped the test. Using Adaptive VCore Prime95 boosted voltage to 1.385 instantly.

Going to try with Static voltage now.
** BSOD in under 1 minute with Static voltage @ 1.300.

I'm definitely not going to use Prime95 for stress testing. I'm going to run 6 hours on the intel stress test then do some encoding. Once i have a GPU I'll do a marathon BF4 session and a few hours of Last Light. If no BSOD or WHEA errors in event viewer I'll call it stable.
If for some reason I get a BSOD doing something outside the norm a few months from now I'll bump VCore a bit.

I'm still planning on playing with the cache ratio & Voltage to hopefully get it closer to the core ratio. This was all done with my memory on 1600 as well. Hoping to get at least 1866 or possibly 21/2400 if the OC remains stable.
 
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I guess after looking back what I meant was that p95 27.9 I do find to be a useful test. 28.1 on air seems less useful because people may be barely passing at stock settings... or not able to keep from throttling. Obviously there is a reason it's not available on the Prime-Mersenne site.
 
For shits and giggle I dropped my clock to 4.0 with 1.17v last night and ran P95 27.9. Temps spiked to 97c in about 15 minutes. There's no fucking way that software is properly loading the CPU.
 
For shits and giggle I dropped my clock to 4.0 with 1.17v last night and ran P95 27.9. Temps spiked to 97c in about 15 minutes. There's no fucking way that software is properly loading the CPU.

Agreed.

I ran the Intel Stress Tester for 7 hours overnight and the machine passed. Max temp was 79C which is probably due to the ambient temp dropping 4 degrees overnight.

Core 4.7 @ 1.300 Adaptive
Cache 4.3 @ 1.235 Static
Input Voltage @ 1.90

Passing a 7-hour stress test with all threads @ 100% load and instantly failing P95 is enough to make me stop using P95.

IBT @ Standard passes 10 runs as well. I can't run any higher or the CPU nukes.
 
Blowing up CPU by a game that uses similar power requirenments as prime. That's a worthwhile goal.
 
Blowing up CPU by a game that uses similar power requirenments as prime. That's a worthwhile goal.

BF4? Not even close to Prime95 in terms of load.

I haven't played on the 4770k yet but on the 2500K @ 4.8 Prime95 temps were ~70-77 and BF4 were in the mid 50's.

Planetside2 is much more taxing on the CPU than BF4 so I'll use it to perform additional stress testing.
 
Am I the only one amused at the fact this 50+ post thread is basically a mirror of the thread two threads down in this same forum and was started 4 days earlier? I won't even start on the fact this isn't even in the overclocking and cooling forum and both threads are specifically about overclocking and heat issues, lol.
 
Am I the only one amused at the fact this 50+ post thread is basically a mirror of the thread two threads down in this same forum and was started 4 days earlier? I won't even start on the fact this isn't even in the overclocking and cooling forum and both threads are specifically about overclocking and heat issues, lol.

Thanks for that well thought out, constructive contribution to the thread. This solves all our issues! :D
 
Thanks for that well thought out, constructive contribution to the thread. This solves all our issues! :D

I know you read the other thread, where such information has been posted already, you really want me to copy/paste all that stuff that is available in a thread right below this one?
 
For shits and giggle I dropped my clock to 4.0 with 1.17v last night and ran P95 27.9. Temps spiked to 97c in about 15 minutes. There's no fucking way that software is properly loading the CPU.

Prime95 27.9 uses the AVX instructions in the processor. This creates far more heat and power consumption compared to programs that do not use the AVX instructions. If all you are interested in is playing games that are not using the AVX instructions then you can be 100% game stable even if you are not Prime 95 27.9 stable. P95 is trying to fully use what your CPU is capable of. Most other software does not.

The next edition of P95 will probably start using the AVX2 instructions that are available in the 4th Gen CPUs. Game developers are typically way behind the curve when it comes to new technology like this.
 
Yeah, okay. I tried Prime95 28.1 (small in-place FFT's) and my system failed in like a few seconds. I jacked up the voltage to 1.31 and it ran for about a minute and then bluescreened, but I looked at the sensors and I was honestly afraid of this monster. It managed to make my processor go to 99C like near instantly. What the heck? I was honestly surprised I wasn't smelling burning in there, that's ridiculous.

Apparently for everything I'm doing with my system, 1.305 is fine and my temperatures stay good. Heck I even did a handbrake conversion just now, went through just fine. I don't understand what kind of stability this tool is measuring... I don't think I could remain stable under any settings if this thing makes me go over 99C INSTANTLY at this overclock. o_0



Not everyone has the time (or shamelessness in a way) to go around cherry picking all of their processors until they get one that actually hits what you reviewers do. Unlike you guys, this stuff ain't my life, it's just a side hobby.

Yes, I know the CPU on the test bench is cherry picked. That was done for a reason. We didn't want a poor CPU limiting what the motherboards could do. We wanted to give each motherboard a chance to reach high levels of performance and try and see what if any difference the board made. So our CPU was tested at 4.8GHz before we got it. And actually, it's capable of more with more extreme cooling than what I'm using. And in any case, I didn't mean to suggest you should cherry pick your CPUs. I'm simply stating that your using a lot of voltage for relatively small gains. This isn't abnormal necessarily as a large percentage of these CPUs fall about where yours is. I'm just providing information.

And as I explained earlier, the problem with these CPUs is the IVR. The CPU decides what amount of voltage is needed for the current clock speed it's running at based on application demands. Newer editions of Prime95 are using AVX instructions and Unclewebb said. This is creating a load on the CPU which is unrealistic. It's synthetic. Granted if it's Prime stable it's stable, but don't expect to see insane overclocks on these CPUs. Most of them simply can't sustain 1.3v or more which is often required to break 4.5GHz or so. Even if the CPU is stable in the short term, if you can't dissipate the heat, heat soak will cause the temps to slowly creep up until failure.

You can use manual voltage and ensure the CPU can't use anymore power than you specified. The problem with that is that the CPU will never use less voltage than that even when it doesn't need it. So the heat soak you get will be worse, as is power consumption and general thermal conditions for the board and system. We test in this manner because it's easy and we are just going for broke to hit the maximum results achievable. The problem with Aida64 and some other benchmark utilities is that they don't create conditions in which the IVR behaves the way it would in actual applications. Prime95 is too harsh and Aida64 is too soft.

Actual applications, and how much voltage they'll cause the CPU to use varies wildly. You should use adaptive voltages for the best thermals, etc. but if you don't use manual voltage with Prime95, your temps will hit excessive thermals in mere seconds. The CPU may call for as much as 1.45v or so with the CPU clocked at 4.6GHz+ while running Prime95 as an example. That's more than Handbrake will use, more than your games will use and more than most anything will use. It's just how Prime95 loads the system. Intel's own Burn in Test is pretty bad about this too. Intel's IVR rules basically have a voltage curve relative to the clock speed it is currently running at and for stability sake it's pretty greedy about voltage and how much it wants. It likes a lot of voltage sometimes. The problem is, that this is bad from a thermal standpoint. To make matters worse these CPUs have a lot of variances in their IMCs. So one CPU can do 4.6GHz at 2400MHz memory and others will struggle to do anything over DDR3 1600MHz. Haswell is an interesting architecture but overclocking is now more luck of the draw than it has been in over a decade.

One final note, be careful with your voltages and thermals. We've seen CPUs that seem to degrade in a short time. They'll run with DDR3 1866MHz memory speeds or so, or hit 4.8GHz at first and then over time they'll do less and less. Our sample size isn't large enough to state this conclusively, but it's something that we've "noticed" on one or more CPUs. There are other variables possibly at play, so again your mileage may vary. I'd hate to see people roast their CPUs when they don't have the luxury of simply having a new one sent to them. So be careful. Remember, at 4.4GHz Haswell is roughly as fast as Ivy Bridge was at 4.6GHz and Sandy Bridge at 4.8GHz.
 
Yes, I know the CPU on the test bench is cherry picked. That was done for a reason. We didn't want a poor CPU limiting what the motherboards could do. We wanted to give each motherboard a chance to reach high levels of performance and try and see what if any difference the board made. So our CPU was tested at 4.8GHz before we got it. And actually, it's capable of more with more extreme cooling than what I'm using. And in any case, I didn't mean to suggest you should cherry pick your CPUs. I'm simply stating that your using a lot of voltage for relatively small gains. This isn't abnormal necessarily as a large percentage of these CPUs fall about where yours is. I'm just providing information.

And as I explained earlier, the problem with these CPUs is the IVR. The CPU decides what amount of voltage is needed for the current clock speed it's running at based on application demands. Newer editions of Prime95 are using AVX instructions and Unclewebb said. This is creating a load on the CPU which is unrealistic. It's synthetic. Granted if it's Prime stable it's stable, but don't expect to see insane overclocks on these CPUs. Most of them simply can't sustain 1.3v or more which is often required to break 4.5GHz or so. Even if the CPU is stable in the short term, if you can't dissipate the heat, heat soak will cause the temps to slowly creep up until failure.

You can use manual voltage and ensure the CPU can't use anymore power than you specified. The problem with that is that the CPU will never use less voltage than that even when it doesn't need it. So the heat soak you get will be worse, as is power consumption and general thermal conditions for the board and system. We test in this manner because it's easy and we are just going for broke to hit the maximum results achievable. The problem with Aida64 and some other benchmark utilities is that they don't create conditions in which the IVR behaves the way it would in actual applications. Prime95 is too harsh and Aida64 is too soft.

Actual applications, and how much voltage they'll cause the CPU to use varies wildly. You should use adaptive voltages for the best thermals, etc. but if you don't use manual voltage with Prime95, your temps will hit excessive thermals in mere seconds. The CPU may call for as much as 1.45v or so with the CPU clocked at 4.6GHz+ while running Prime95 as an example. That's more than Handbrake will use, more than your games will use and more than most anything will use. It's just how Prime95 loads the system. Intel's own Burn in Test is pretty bad about this too. Intel's IVR rules basically have a voltage curve relative to the clock speed it is currently running at and for stability sake it's pretty greedy about voltage and how much it wants. It likes a lot of voltage sometimes. The problem is, that this is bad from a thermal standpoint. To make matters worse these CPUs have a lot of variances in their IMCs. So one CPU can do 4.6GHz at 2400MHz memory and others will struggle to do anything over DDR3 1600MHz. Haswell is an interesting architecture but overclocking is now more luck of the draw than it has been in over a decade.

One final note, be careful with your voltages and thermals. We've seen CPUs that seem to degrade in a short time. They'll run with DDR3 1866MHz memory speeds or so, or hit 4.8GHz at first and then over time they'll do less and less. Our sample size isn't large enough to state this conclusively, but it's something that we've "noticed" on one or more CPUs. There are other variables possibly at play, so again your mileage may vary. I'd hate to see people roast their CPUs when they don't have the luxury of simply having a new one sent to them. So be careful. Remember, at 4.4GHz Haswell is roughly as fast as Ivy Bridge was at 4.6GHz and Sandy Bridge at 4.8GHz.

Thanks for the very detailed response. I did kind of take what you were saying the wrong way.

So, you think this CPU will slowly thermally degrade at 1.305 vcore? I know you said you don't have any real proof for it, but it's an interesting mention that I haven't heard of before. Most people on other sites are under the impression that under something like 1.35 Vcore is fine. If you're actually correct then it would be nice to share that information with some of these other places. And you are correct, I could probably lower down to 4.4Ghz without too much issue and go down to 1.2x VCore without too much of a performance hit. I was doing 4.2 on 1.15 earlier.

Also, again I have found that Prime95 25.11 (large FFT) does a decent job as far as I was concerned. It did show that thermal creep you were talking about, too. Temps started at like 6x and slowly kept rising until they capped out at 7x. Any clock I've had so far that lasted 40mins-1hr in it seems to be pretty stable for weeks of use for gaming and roughly anything else. Might just be a coincidence. I just know that this new Prime95 is too ridiculous.
 
Thanks for the detailed response. I'm thinking adaptive voltage at 4.0–4.2 is easy, safe, and stable for air. It's also as fast as a good Sandy OC with the benefit of pci 3.0 and more threads.
 
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Thanks for the very detailed response. I did kind of take what you were saying the wrong way.

So, you think this CPU will slowly thermally degrade at 1.305 vcore? I know you said you don't have any real proof for it, but it's an interesting mention that I haven't heard of before. Most people on other sites are under the impression that under something like 1.35 Vcore is fine.

They didn't bother to read Intel's manuals. Actually from what I seen Asus engineers didn't either, or there is a typo in the Intel's manual.
 
I use Linpack (LinX/IBT) first and Prime second.

Seems to me like Linpack points out a bad OC fastest and Prime points out overall stability of what you'd see over time. I've seen OC's go 6+ hrs in Prime without issues and fail under Linpack in under an hour; likewise, I've seen a 20 pass Linpack run finish and then fail 2 hours into a 6+ hour Prime session.
 
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They didn't bother to read Intel's manuals. Actually from what I seen Asus engineers didn't either, or there is a typo in the Intel's manual.

Well what's interesting is that my MSI MPower actually tries to tell you to keep your vcore under 1.3. Out of all the companies, MSI is the one that's trying to keep you safe. Lol.

I guess I might try to jack it down to 4.4 when I get home from work and get something under 1.3 (should be easy since I did 4.2 on 1.15). That should be safe right?
 

Awesome response Dan, thanks.

EDIT* Found this:

45 Nanometer 1st Generation Core i ..... 1.40 Vcore
32 Nanometer 2nd Generation Core i .... 1.35 Vcore
22 Nanometer 3rd Generation Core i ..... 1.30 Vcore
22 Nanometer 4th Generation Core i ..... 1.30 Vcore

http://www.tomshardware.com/answers/id-1694551/safe-voltage-temp-4770k.html#11533981

I suppose I'll stick with 4.7 @ 1.300V for now. May drop to 4.6 just to give myself some headroom as I'm on adaptive voltage.
 
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That might explain why my g41 is capped at 1.30. One inaccuracy I found in that article is that the Intel Thermal compound is the reason to delid; while using a better compound helps, the real gains are from decreasing the distance from the cpu to the ihs by removing the glue.
 
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That might explain why my g41 is capped at 1.30. One inaccuracy I found in that article is that the Intel Thermal compound is the reason to delid; while using a better compound helps, the real gains are from decreasing the distance from the cpu to the ihs by removing the glue.

Interesting. I want to delid at some point,,, my 4770k is crappy enough that I plan to practice on it once I find one that seems like a winner.

I would have guessed that the glue is causing a heat island effect of the air inside the space between. But your explanation makes more sense I think. I'm sure someone has the right answer and that's as plausible as any I've heard. I haven't tried hard to find out more about it, either. I am curious if temps around throttling (boiling water ish) has any effect on the glue itself.
 
About all you can do is get rid of the heat with better cooling. Or go down until you can control the heat and stop it from going up. Then set a happy safe overclock from there that is stable. Intel surely did a piss poor job on these chips. Yes I said it so no one else had too. Hot running piece of crap.........::mad:
 
Yes, I know the CPU on the test bench is cherry picked...

Yah there's a lot of good info in this one reply. Until like a few days ago I was under the impression that even if you had a manual voltage dialed in, there was a BIOS option for Haswell that would cause CPU states to include voltage degradation. I'm still not fully clear on this point, but a prog like HWMonitor (CPUID) will only display your Vcore going up and down like it should if you have an adaptive voltage set up for it. I'm guessing AI Suite (asus software) was throwing me off... it likes to display .000 voltage often and that's gotta be wrong.
 
What volts, version of Prime, and how long are you testing?

With that version of Prime, I can do 4.5ghz under a 212+ for hours with low temps. It all depends on what stress test you choose. With Aida64, I had to turn it down to 4.2.

1.252 for the voltage

I just use the automatic overclock settings on my motherboard.
GIGABYTE GA-Z87X-OC Force

I'm not sure which version of Prime I used, it was 6 months ago and I don't have it anymore, probably whatever the newest version was then. I think I ran it for over a half hour and the temps weren't changing anymore.

The only time I actually max out my CPU like Prime does is when I convert videos, and that rarely takes over 10 minutes. I could probably clock higher and be stable, but I want my PC to last a long time and I'm worried about the wear the extra heat would cause.
 
I'm getting a little ill with Prime95 and the 4770k I'm trying to overclock for a customer.. Prime keeps spiking in temps be fine at 52c or so and then out of no where spike to 75c. or higher never had that happen with prime before. Always had it stay at a pretty constant temp with good cooling.. Prime95 is running hotter then Intel burn in test and I have never seen that happen before with prime95 .Running but in test right now and it's over 10 passes and not failing or getting over 72c.. Just makes no sense. Usally make sure a system is 24 hours of prime stable but now I have no Idea whats the best thing to check to make sure it's stable now..
 
Thanks for the very detailed response. I did kind of take what you were saying the wrong way.

So, you think this CPU will slowly thermally degrade at 1.305 vcore? I know you said you don't have any real proof for it, but it's an interesting mention that I haven't heard of before. Most people on other sites are under the impression that under something like 1.35 Vcore is fine. If you're actually correct then it would be nice to share that information with some of these other places. And you are correct, I could probably lower down to 4.4Ghz without too much issue and go down to 1.2x VCore without too much of a performance hit. I was doing 4.2 on 1.15 earlier.

CPUs always degrade over time from electromigration and other effects - electronics wear out just like anything else. It is only a question of how quickly. If you keep the voltage and temperature within Intel specs, it will last the warranty and probably much longer.

Electomigration effects depend exponentially on the temperature and quadratically on the voltage. So the more voltage and higher temperature, the faster the chip "wears-out". The first effect you will see from electromigration is higher voltages required over time to keep the same overclock stable, as the conductors in the chip are eroded away. Raising the voltage to compensate leads to faster degradation so it accelerates over time. Eventually you will see failure due to non-conductance or a shorst from conductor material that migrated between conductor traces on the chip making contact.

It is a fact, the question is how long will it take at 1.3 volts for the processor to degrade to the point it isn't usable. There is no hard data on this since it is out of the spec and testing of the manufacturer - only anecdotal data exists.
 
I like the part where Intel forgot what "K" meant on the cpu model number myself. The average user isn't going to have the stuff you need to keep this cpu cool. Yes you can do 4.2 or 4.3GHZ fine But it boost to almost 4.0GHZ to begin with. Kinda defeats the purpose then. But it is what it is and Intel knows what they did.
 
Interesting. I want to delid at some point,,, my 4770k is crappy enough that I plan to practice on it once I find one that seems like a winner.

I would have guessed that the glue is causing a heat island effect of the air inside the space between. But your explanation makes more sense I think. I'm sure someone has the right answer and that's as plausible as any I've heard. I haven't tried hard to find out more about it, either. I am curious if temps around throttling (boiling water ish) has any effect on the glue itself.
I've been doing LOTS of research. Good info here:
http://forums.anandtech.com/showthread.php?t=2261855

I was specifically referencing this:
http://forums.anandtech.com/showpost.php?p=34053183&postcount=570

Major takeaways - use CLU or CLP between the CPU and IHS and NT-H1 between the IHS and your cooler. Big temp gains.
 
I like the part where Intel forgot what "K" meant on the cpu model number myself. The average user isn't going to have the stuff you need to keep this cpu cool. Yes you can do 4.2 or 4.3GHZ fine But it boost to almost 4.0GHZ to begin with. Kinda defeats the purpose then. But it is what it is and Intel knows what they did.

My auto overclock set the board to 4.2 immediately @ something like 1.15V so if I'm going to bother OCing manually I would like to beat that by 400-500 MHz at least...
 
Yes I seen your "i7 4770k @ 4.7GHz 1.295V" sig there. I tried a Phanteks PH-TC14PE and it really didn't make much of a difference in the heat. So roughly another $100 bucks and still can't contain the heat. I was going to try out my H100i but after all of the swapping it just makes my not even feel like bothering with it. In other news I hit 2,933mhz on my ram pretty easily though.....

My auto overclock set the board to 4.2 immediately @ something like 1.15V so if I'm going to bother OCing manually I would like to beat that by 400-500 MHz at least...
 
Yah there's a lot of good info in this one reply. Until like a few days ago I was under the impression that even if you had a manual voltage dialed in, there was a BIOS option for Haswell that would cause CPU states to include voltage degradation. I'm still not fully clear on this point, but a prog like HWMonitor (CPUID) will only display your Vcore going up and down like it should if you have an adaptive voltage set up for it. I'm guessing AI Suite (asus software) was throwing me off... it likes to display .000 voltage often and that's gotta be wrong.

Nope. If you manually set the voltage, then that's what it uses full time.

I'm getting a little ill with Prime95 and the 4770k I'm trying to overclock for a customer.. Prime keeps spiking in temps be fine at 52c or so and then out of no where spike to 75c. or higher never had that happen with prime before. Always had it stay at a pretty constant temp with good cooling.. Prime95 is running hotter then Intel burn in test and I have never seen that happen before with prime95 .Running but in test right now and it's over 10 passes and not failing or getting over 72c.. Just makes no sense. Usally make sure a system is 24 hours of prime stable but now I have no Idea whats the best thing to check to make sure it's stable now..

Prime95 unrealistically loads the CPU. If you get a couple of hours out of Prime95 and all you see are high temps it's probably OK. Honestly I'd like to see a better software package for testing this but Aida64 isn't it.



As for what voltages are safe, I'm not really sure. 1.30v and less seems to work fine thus far on my test CPU and I have used more than 1.3v on occasion so far with no ill effects. Though the IMC on this CPU doesn't like voltages that high. If I do that it won't run DDR3 2400MHz speeds.
 
Welp, I had a blue screen on Civ 5 earlier. It probably didn't happen all of the other times I've played it because this is the first time we've had turns go by constantly (so it had to calculate AI actions constantly). This friend was a lot faster going through the turns lol.

Anyway, I know it'll probably be fine at 1.31vcore, but honestly I don't really know what to do with anymore, so I just utterly reset it to stock for now.

Also, for giggles I tried running Prime95 28.1 totally at stock. Was hitting around 83C. I'm wondering if I put my Kraken X40 on there wrong. Maybe I need to redo the paste and stuff. For now I'm just gonna leave it at stock so I don't have to worry about it. Might do a modest boost up to 4.3 or so eventually, but 4.5 is apparently unattainable for me without going to 1.31 vcore, and that's probably not safe.

Oh well, crap luck in silicon lottery ho! Not that my luck is better in much else.
 
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