Intel Devil's Canyon: The Good, the Bad, the Ugly @ [H]

hey all, need some validation here.. at stock settings, (i.e. 4.4 GHZ boost), im seeing a vcore of 1.1907 (in adaptive mode, prime95 small FFT, hyperthreading enabled, cores unparked). Temperatures in prime95 small FFT are high 70's, low 80's (custom loop). Is this a good start?
 
should I upgrade to the 4790k from my i7-950? Really only CPU intensive thing is gaming for me. Have a 780gtx paired with my OC'd 950 @3.6ghz and 12gb ram.
 
I'm not upgrading mine yet, though my 950 is running @ 4.2 and I have the same GPU & monitor as your sig..
 
I finally found the 100$ stable sweet spot with the retail DC. 4.7GHz/2400MHz at 1.35v Core. Fully stable with Prime95 for days and days.
 
dcho said:
:eek: awesome. I *think* im stable at 4.6 ghz / 1.21 vcore / 2400 MHz so I will try for 4.7.
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Did you adjust the cache any?

I ran everything stock for now minus upping the multiplier to 45. I think my setup is 4.5GHz Core 4.4GHz Cache/Ring but any higher it would BSOD in benching. :(
 
JL6speed said:
Did you adjust the cache any?

I ran everything stock for now minus upping the multiplier to 45. I think my setup is 4.5GHz Core 4.4GHz Cache/Ring but any higher it would BSOD in benching. :(
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I didn't. I left everything to auto. the only thing that was changed was the vcore, which I changed from auto to adaptive. i'm pretty stoked considering the last two chips I had were horrible.
 
I'm trying to find a voltage where this thing doesn't throttle under Prime95 28.5. Doesn't look like mine can go much above 1.2. :( Stupid D14, why aren't you good enough!
 
I got mine stable at 4.7ghz 1.215V ran prime95 for 10 hours. IBT for the full ram and passed.

I gave up trying to achieve 4.8ghz even at 1.28v I gave up there. Maybe later I'll try to experiment to get to 4.8ghz but I'm very happy.
 
wiregen said:
I got mine stable at 4.7ghz 1.215V ran prime95 for 10 hours. IBT for the full ram and passed.

I gave up trying to achieve 4.8ghz even at 1.28v I gave up there. Maybe later I'll try to experiment to get to 4.8ghz but I'm very happy.
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What version of Prime are you using? You're doing much better than I am; I'm using more voltage at 4.5 GHz and crash around hour three.
 
Yeah mine's not so bad. Stable at least at 4.7Ghz is my guess but no long term testing done yet. I haven't made it bluescreen yet and I'm looking for stable low voltage but I'm also wanting to try 4.8. Started out high at 1.274v (1.202vCache) 46/44x and started bring the voltage down. Now at 47/44x 1.25v(1.202vCache) and just doing some low temperature testing. I have a new motherboard and enough watercooling gear to make a large aquarium coming in tomorrow.

My chip is hottttttt. Needs a delidding and a real waterblock/loop. I'm enthusiastic. As long as it wasn't worse than the 4770K i cherry picked I'm good.

As for the new packaging materials? humph and bah hum bug. These need to be delidded every bit as much as Haswellv1 to play nice with little coolers. I'm sure my Noctua NH-u12S would work a bit better but not enough to avoid delidding.
 
L239C241 from microcenter, Cooler Master 212 EVO
[email protected] Prime95 v28 60.0C
[email protected] Prime95 v28 80.0C

(that's what AI Suite 3 did automatically, may try lowering voltage a bit for 4600MHz, 80C is too hot and the fan is too loud for my taste).
 
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If anyone bought their processor from Amazon at $339, it has dropped to $329. They'll refund you the difference if it is within seven days of the invoice. Just got my ten bucks back.
 
My batch L336D109 4790K from Newegg does 4.5GHz on 1.173V. It stays between 55-60C on an EVO 212 (pull only - need a thinner fan for push due to the drive cage) inside a TJ08-E with the front intake 180mm on low during Prime95 v28. I can barely hear the system during usual use, and it's quite quiet under real world load. I'm happy and probably won't bother spending the $15 on a thin 120mm fan for the EVO to push just to get to 4.7GHz - less than a 5% increase in clock speed from 4.5GHz.
 
Gigantopithecus said:
My batch L336D109 4790K from Newegg does 4.5GHz on 1.173V. It stays between 55-60C on an EVO 212 (pull only - need a thinner fan for push due to the drive cage) inside a TJ08-E with the front intake 180mm on low during Prime95 v28. I can barely hear the system during usual use, and it's quite quiet under real world load. I'm happy and probably won't bother spending the $15 on a thin 120mm fan for the EVO to push just to get to 4.7GHz - less than a 5% increase in clock speed from 4.5GHz.
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:eek: amaze!
 
how the evo 212 can perform up there with the likes of air and AIO coolers is beyond me, nice chip though
 
Gigantopithecus said:
My batch L336D109 4790K from Newegg does 4.5GHz on 1.173V. It stays between 55-60C on an EVO 212 (pull only - need a thinner fan for push due to the drive cage) inside a TJ08-E with the front intake 180mm on low during Prime95 v28. I can barely hear the system during usual use, and it's quite quiet under real world load. I'm happy and probably won't bother spending the $15 on a thin 120mm fan for the EVO to push just to get to 4.7GHz - less than a 5% increase in clock speed from 4.5GHz.
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Can you post your specs/motherboard and any settings not left to AUTO in the BIOS ? I'm rock solid @ a manual 1.21 vcore setting for 4.5GHz, a few DGM+ changes, XMP profile for RAM, everything else AUTO; however, I think there's room for improvement.

And nice chip by the way
 
BM00 said:
Can you post your specs/motherboard and any settings not left to AUTO in the BIOS ? I'm rock solid @ a manual 1.21 vcore setting for 4.5GHz, a few DGM+ changes, XMP profile for RAM, everything else AUTO; however, I think there's room for improvement.

And nice chip by the way
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Asus Z97M-Plus motherboard and 8GB (2x4GB) of Samsung Magic RAM. The RAM is set to 8-8-8-21 at 1866MHz at 1.35V - same settings I've had them on in my previous two main rigs. Everything is still set to auto in the BIOS except the multiplier, which I simply flipped to 45. Thanks - lucked out with this 4790K after getting a handful of 4770K duds. :p
 
Welp. Tuned the comp some more. 4790K @ 4.7GHz with VCORE @ 1.287V. Had to lower the cache/ring(MSI boards) to 40 ratio at 1.2V.

This is a very nice jump from 3.7GHz i7 870.
 
Gigantopithecus said:
Asus Z97M-Plus motherboard and 8GB (2x4GB) of Samsung Magic RAM. The RAM is set to 8-8-8-21 at 1866MHz at 1.35V - same settings I've had them on in my previous two main rigs. Everything is still set to auto in the BIOS except the multiplier, which I simply flipped to 45. Thanks - lucked out with this 4790K after getting a handful of 4770K duds. :p
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Nice, if the motherboard sets such a low vcore for AUTO tuned 4.5GHz that must be an exceptional chip! Great RAM settings too, wow.
 
BM00 said:
Nice, if the motherboard sets such a low vcore for AUTO tuned 4.5GHz that must be an exceptional chip! Great RAM settings too, wow.
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It's called Magic RAM for a reason. :) I wish they still sold these - their performance is amazing.
 
I have an L419B609 batch 4970k. I have been out of the loop, haven't overclocked my cpu since the core 2 duo days (really confused about a proper uncore ratio). All I have is the original Hyper 212. So far I'm doing 4.6GHz @ 1.28v. It will do 4.7 at that same voltage but it will get super hot after time running Prime 95. I can boot at 4.8 with those settings, and surf the web and watch youtube without issue but it will bsod as soon as I fire up prime95.

I need to dig out my old collection of fans and see if I can at least get some better airflow going, before I figure out what kind of cooler I should upgrade to.

EDIT:
I'm now stable at 4.7ghz 1.245 vcore, but only 42x uncore speed. If I raise uncore higher it won't boot at x44 and had trouble with x43. I'm not sure how much of a performance gain it would be to get the uncore higher. Just starting to understand what the uncore does.

My temps avg. 75ish with the ole' Hyper 212+ air cooling.
 
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Hello everyone.
Old time larker but new member.

Joined the forums to give ,my personal feedback regarding the controversial I7-4790K.

Well... it seems that I am one of the very few in the lucky minority of the 5% as Kyle suggests.
All my tests follow the same path.
1) Two hours of Aida64 extreme.
2) Two hours of XTU
3) Two hours of latest Prime95 version.

Results :

1) 4.6 rock stable at 1.25V core and 4.2 imc with 1.185V. Max temperature by core temp
71C.
2) 4.7 rock stable at 1.2850V and 4.3 imc with 1.20V. Max temp 76C.
3) 4.8 rock stable at 1.330V and 4.4 imc with 1.25V. Max temp 83 ( barely one core )
4) 4.9 rock stable at 1.380V and 4.5 imc with 1.30V. Max temp 92-93, no throttling.
5) 5.0 not stable. Boots normally with 1.425. CAN do some light work but no benching.
Heavy throttling at 100C all cores but still no BSOD.

The Corsair H100i is at full blast in all occasions and is working in push-pull configuration
with two maxflo 14cm fans which are PWM controlled.

Some scores I have recorded are :

XTU cpu benchmark 1287 at 4.9 ghz.
Cinebench R15 , cpu benchmark 992 and openCL 192 fps.
3D Mark 2011 ( Performance ) 23.852.

All voltages are applied manually in the bios. SA voltage offset +0.25 in all setups,
hyperthreading ALWAYS enabled, C state C3.

That is it.
An unstoppable machine, which can easily go to 6+ with subzero cooling and effective
mosfet cooling on the board.

Thank you.

P.S. Very nice to be here with the best overclocking forum on the net.
 
seanmcd said:
I have an L419B609 batch 4970k. I have been out of the loop, haven't overclocked my cpu since the core 2 duo days (really confused about a proper uncore ratio). All I have is the original Hyper 212. So far I'm doing 4.6GHz @ 1.28v. It will do 4.7 at that same voltage but it will get super hot after time running Prime 95. I can boot at 4.8 with those settings, and surf the web and watch youtube without issue but it will bsod as soon as I fire up prime95.

I need to dig out my old collection of fans and see if I can at least get some better airflow going, before I figure out what kind of cooler I should upgrade to.
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I have the same exact batch as you. Bought it @ MC in Madison Heights Detroit.
So have I have a really quick and dirty OC of 4.7GHz @ 1.3010v with 2400MHz RAM on my Maximus VI Formula.
Passed XTU bench, 30min of BF4 but I still have to run OCCT to validate this OC.

There is another member on the Overclock.net Forum that has our batch.
He is pushing this setup:

"KnownDragon i7 4790k 4.8Ghz 1.089v/1.29v 67-73-69-75 L419B609 2400Mhz 10-12-12-31 Asus Maximus Vii Hero WATER - XSPC Raystorm"
 
I don't understand this chip :) - It will run prime95 at 4.7ghz fine for 30-40 minutes at around70-80c but eventually the temps spike up to 100c out of the blue and it throttles the speed back. Just debating on cooling options. Too many choices

EDIT:
I'm now stable at 4.7ghz 1.245 vcore, but only 42x uncore speed. If I raise uncore higher it won't boot at x44 and had trouble with x43. I'm not sure how much of a performance gain it would be to get the uncore higher. Just starting to understand what the uncore does.

My temps avg. 75ish with the ole' Hyper 212+ air cooling.
 
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If anyone in the DFW, TX area is looking for a 4790K, I can confirm that the Micro Center in Richardson now has the L4 batch in stock. I picked one up for my primary rig (my x79 Sabertooth is starting to take a dump so I'm jumping to a Z97 chipset w/ PLX and a 4790K.)

Just from the boxes I could see in the glass cabinet, where they keep the CPU's, there were at least a few L4's displayed.
 
Batch L418C282-4.6Ghz @ 1.230v...I haven't tried to lower that voltage yet..
Using a Gigabyte Z97X-UD5H, still trying to get use to the bios after running ASUS for many years...
 
Dave65 said:
Batch L418C282-4.6Ghz @ 1.230v...I haven't tried to lower that voltage yet..
Using a Gigabyte Z97X-UD5H, still trying to get use to the bios after running ASUS for many years...
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I"ve got a UD5H-BK and I was wondering what your default voltage is under stock settings. I haven't done any overclocking, but my core voltage is at about 1.225v on stock (and doesn't seem to fluctuate at all even when idle - is that supposed to happen?)

I may just misunderstand how Haswell works since I'm coming from Lynnfield, but I'm wondering if I need to be looking at something in the BIOS for this (or if this is a fine stock voltage)? I'm on the latest BIOS.
 
teiresias said:
I"ve got a UD5H-BK and I was wondering what your default voltage is under stock settings. I haven't done any overclocking, but my core voltage is at about 1.225v on stock (and doesn't seem to fluctuate at all even when idle - is that supposed to happen?)

I may just misunderstand how Haswell works since I'm coming from Lynnfield, but I'm wondering if I need to be looking at something in the BIOS for this (or if this is a fine stock voltage)? I'm on the latest BIOS.
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Weird. Maybe try starting over with optimized defaults. I'm also unfamiliar with GB bios but I know haswell and it should drop voltage when idle by default. It's possible power settings in windows are playing a role. Normally windows defaults to balanced power mode which had the minimum processor state set at 5%. Haswell can actually idle at almost no voltage at all in c states even when speedstep is off (that assumed the monitoring tools I use are all correct but they at least all agree on this even if manufacturer reps don't understand or care about it).

EIST--speedstep you know about. Drops multiplier down as low as 8x. Hard to manually configure.
C-states--if I understand correctly, c7s is the new haswell low power state. Not all PSUs can output this kind of low voltage for the CPU. Thus, Haswell cert./ready PSUs.

They don't need each other and you can turn them both off or choose 1 and not the other. I find EIST saves a lot of power and makes Chrome and other applications stutter. For reference check ufotest.com. Scores in 3d benchmarks improved very slightly with these power saving functions disabled, but I run with speedstep off and c-states fully enabled.
 
Bluesun311 said:
Weird. Maybe try starting over with optimized defaults. I'm also unfamiliar with GB bios but I know haswell and it should drop voltage when idle by default. It's possible power settings in windows are playing a role. Normally windows defaults to balanced power mode which had the minimum processor state set at 5%. Haswell can actually idle at almost no voltage at all in c states even when speedstep is off (that assumed the monitoring tools I use are all correct but they at least all agree on this even if manufacturer reps don't understand or care about it).

EIST--speedstep you know about. Drops multiplier down as low as 8x. Hard to manually configure.
C-states--if I understand correctly, c7s is the new haswell low power state. Not all PSUs can output this kind of low voltage for the CPU. Thus, Haswell cert./ready PSUs.

They don't need each other and you can turn them both off or choose 1 and not the other. I find EIST saves a lot of power and makes Chrome and other applications stutter. For reference check ufotest.com. Scores in 3d benchmarks improved very slightly with these power saving functions disabled, but I run with speedstep off and c-states fully enabled.
Click to expand...

Hmm, I'll look around in the BIOS, but the clock speed does drop during idles, it's just vcore doesn't change - unless HWinfo is not giving me accurate information.
 
Just ran AIDA64 again and realized I must have been looking at the wrong column in HWinfo, as it does drop the core voltage down to about 0.723 on lower workloads. I corroborated this with CPU-Z.

Still, at full load with all four cores running @ 4.4GHz the Vcore goes to 1.237. The setting set in the Gigabyte BIOS when I load optimized defaults is 1.224 (and the current status Vcore when in the BIOS reads at 1.215V). Perhaps this isn't really high, or maybe it actually would be stable at a lower voltage if I were to manually set it and Gigabyte just overcompensates.

I do find it odd that under a full 4-core load all four cores go to 4.4GHz when in the BIOS the 4-core multiplier is like x42 (x44 for 1-core or 2-core boost, x43 for 3-core boost, and x44 for 1 core boost). So it's like the boost doesn't perform like I'd expect based on the BIOS settings - not that I'm complaining, all cores stay under 75C during an AIDA64 stress test (with FPU, CPU, and cache stressing checked), which doesn't seem horrible to me.
 
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Hi all,

Sorry, I know this is a few weeks old. But I just stress tested my new build i-7 4790k under Small FFTs, and the temp of the CPU show to 88c in HWMonitor. Is this anywhere near doing damage to the CPU? What temperature do you have to reach to damage it? I only let it run at that for 5-10 seconds, and got scared!
 
Yah p95 small fft's is nuts. I use it for a fast stability test but your temps with it are normal. You really can't hurt these chips with heat. If they get to 105C they will lower their own clocks to cool down and if it's still to hot they just shut off. You're fine.
 
gizmo2501 said:
Hi all,

Sorry, I know this is a few weeks old. But I just stress tested my new build i-7 4790k under Small FFTs, and the temp of the CPU show to 88c in HWMonitor. Is this anywhere near doing damage to the CPU? What temperature do you have to reach to damage it? I only let it run at that for 5-10 seconds, and got scared!
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Hey there gizmo2501! In my opinion, the only way to "damage" these chips with heat is to get it running as close as you can to max temp and running it full load synthetic benchmark all day. In a typical usage scenario (including games), you won't be stressing your CPU as much as the synthetic test is and you won't be generating such high temps. Also, if you reach a temperature (higher than 88C, likely 90C or 95C) the processor will throttle itself or it will simply shut down to prevent damage.

Do some more reading and before you know it you will be taking CPU's to their limit without fear!

Cheers!
 
Went for 4790k in z97 pro wifi. I love that CPU and board. Not only the power of it, but for all the energy savings and perfectness of asus fan controlling tool. When I'm just web browsing, I'm running on 800 MHz without any noise from fans. It's enough for YT, mail and such. And then, when I'm gaming, it wakes up the fans and the CPU to full power. So far I run that asus 5 ways optimization tool, that gave me "just" 4,6 ghz, but when my h110 arrives, I'll try to manually push it more.

The difference in gaming? In Tomb Raider, compared to sandy bridge, the max FPs went from 50 to 60, and minimum FPs got boost too. Final fantasy xiv runs about 14 FPs higher, and the uninvited heaven 4 benchmark went up by about 16 fps

I know, those are not breathtaking results, but I appreciate not only the raw power, but the z97 chipset and it's abilities, along with power saving tools, heat and such. I really enjoy that upgrade, and I'm glad I stopped hesitating. For me, it was worth to upgrade
 
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