7700K Heat & Voltage Question.

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Sharpy

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Just recently built this new PC and haven't had a new PC since my old Q6600 CPU. Coming into the new PC market again (very horrible time to get back in lol) and don't know what to look for with the new hardware. Still don't have a GPU yet and currently running off of the Intel Graphics. Hitting 88C - 90C @ 5.0GHz at full load with a Cooler Master Hyper when running Cinebench (will be getting a Corsair Hydro H150i PRO soon). 32C - 35C Idle on High Performance mode. Is this any good? Motherboard is an EVGA Z270 FTWK.

Thanks.
 
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seems too hot, Cinebench is a very light load compared to, say, Prime95 or an encoder. you really don't want to run 90C at the elevated voltages required to reach 5Ghz, it will degrade your chip over time.
 
bwang said:
seems too hot, Cinebench is a very light load compared to, say, Prime95 or an encoder. you really don't want to run 90C at the elevated voltages required to reach 5Ghz, it will degrade your chip over time.
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So what do you think I should start at to run Prime95 and which test should I run in Prime?
 
I usually run Blend long enough for the system to reach thermal steady state; Blend is not a realistic instruction mix for consumer workloads but it represents a worst case real-world thermal scenario; Small FFT runs in cache and puts loads on the FPU that only dense matrix benchmarks can match. If I'm going hard on the overclock and expect the system to spend tons of time under load (or if the OC is for someone else), I usually shoot for <85C under Blend. If I'm building a gaming rig, I shoot for "doesn't throttle under Blend", since gaming loads consume much less power than any form of Prime95.

It gets a bit trickier if you don't care about AVX performance (and hence do your overclocking by setting an aggressive AVX offset to stay on the safe side); the old versions of P95 don't use AVX, but it is unclear whether they are good stability tests otherwise in 2018.
 
It's hottttt...don't really want try to run anything crazy...hitting like 80-85c just messing around. You're gonna dog the chip out....
 
bwang said:
I usually run Blend long enough for the system to reach thermal steady state; Blend is not a realistic instruction mix for consumer workloads but it represents a worst case real-world thermal scenario; Small FFT runs in cache and puts loads on the FPU that only dense matrix benchmarks can match. If I'm going hard on the overclock and expect the system to spend tons of time under load (or if the OC is for someone else), I usually shoot for <85C under Blend. If I'm building a gaming rig, I shoot for "doesn't throttle under Blend", since gaming loads consume much less power than any form of Prime95.

It gets a bit trickier if you don't care about AVX performance (and hence do your overclocking by setting an aggressive AVX offset to stay on the safe side); the old versions of P95 don't use AVX, but it is unclear whether they are good stability tests otherwise in 2018.
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I dont have the voltage manually set, it is set to auto in BIOS. Im sure once I have a better cooler on it the temps will drop. I'll run Prime95 around 4.5GHz starting off then gradually go higher.
 
Sharpy said:
I dont have the voltage manually set, it is set to auto in BIOS. Im sure once I have a better cooler on it the temps will drop. I'll run Prime95 around 4.5GHz starting off then gradually go higher.
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I've been running 1.3V on all my Skylake/Kaby Lake systems with good success, usually good for 4.6-4.7GHz on Skylake and 4.8-4.9Ghz on Kaby Lake. 5Ghz is a push and requires some aggressive cooling, certainly not worth it for daily driver use as it is only a couple percent improvement over 4.8GHz.
 
Heres what im getting in HWMonitor when I run Prime95. I lowered it to 4.6GHz then 4.5GHz. Is it better to run it on High Performance mode or Balanced? Do I have to turn on or off any CPU features in the BIOS or leave it as default? How long would you run Prime95 for? When I run Prime95 the CPU speed goes down from 4.5GHz to 4.2GHz then after the tests it goes back to 4.5GHz why is that?
 

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Sharpy said:
Heres what im getting in HWMonitor when I run Prime95. I lowered it to 4.6GHz then 4.5GHz. Is it better to run it on High Performance mode or Balanced? Do I have to turn on or off any CPU features in the BIOS or leave it as default? How long would you run Prime95 for? When I run Prime95 the CPU speed goes down from 4.5GHz to 4.2GHz then after the tests it goes back to 4.5GHz why is that?
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Was going to tell you that the new CPUs have AVX and run hot, the bios also has an AVX offset to reduce cpu speed when AVX is used. This is exactly why you only get 4.2 in P95, your AVX set to offset -3

Anyway the Newest P95 has avx

The older version 26.6? Is non avx and represents more normal load

Many boards overvolted vcore also, so you should check it

You will prob have to settle for 4.7 with that cooler and -3/-4 avx offset. Test both versions of p95 for temps and see if you can lower vcore to help

My 7700k I settled for 4.8 hits 80+ on p95 non avx and -1 avx offset so 4.7 with avx hitting 85 on p95 with avx
 
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Speedeu4ia said:
Was going to tell you that the new CPUs have AVX and run hot, the bios also has an AVX offset to reduce cpu speed when AVX is used. This is exactly why you only get 4.2 in P95, your AVX set to offset -3

Anyway the Newest P95 has avx

The older version 26.6? Is non avx and represents more normal load

Many boards overvolted vcore also, so you should check it

You will prob have to settle for 4.7 with that cooler and -3/-4 avx offset. Test both versions of p95 for temps and see if you can lower vcore to help

My 7700k I settled for 4.8 hits 80+ on p95 non avx and -1 avx offset so 4.7 with avx hitting 85 on p95 with avx
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Thanks a lot for the reply I tried to offset the AVX in BIOS to -3 but it doesn't go below 0.
 

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Sharpy said:
Thanks a lot for the reply I tried to offset the AVX in BIOS to -3 but it doesn't go below 0.
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It will be a positive number but will reduce cpu speed. So 3 would mean -3(from the multiplier).

So you would end up 4.5 non avx like gaming and 4.2 avx
 
Speedeu4ia said:
It will be a positive number but will reduce cpu speed. So 3 would mean -3(from the multiplier).

So you would end up 4.5 non avx like gaming and 4.2 avx
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Oh ok well by default it is +3 and thats what I have been using. So should I keep it at +3?
 
Sharpy said:
Oh ok well by default it is +3 and thats what I have been using. So should I keep it at +3?
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Yes that's what I assumed. +3 is what many use and should work fine.

Basically you need both versions of P95

Run the older version without avx and OC a bit, see the temps and see if it's stable. Maybe play with vcore. You can try 4.7 if you can keep temps 80 or less.

Then when that is stable and temps are ok. Go back and run the avx version which will now be 4.4 and make sure temps are still good and it's stable, should be fine tho
 
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Also the new CPUs down clocks at idle with speedsteps to 800mhz. They also lower vcore to .8v.

When you switch to manual vcore they normally will lower speed but not vcore, so you would end up with [email protected]

You will have to use offset/adaptive vcore to keep the stock idle while being able to adjust vcore
 
Speedeu4ia said:
Also the new CPUs down clocks at idle with speedsteps to 800mhz. They also lower vcore to .8v.

When you switch to manual vcore they normally will lower speed but not vcore, so you would end up with [email protected]

You will have to use offset/adaptive vcore to keep the stock idle while being able to adjust vcore
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It seems that if I put it on High Performance Mode it keeps it at the speed you set it in BIOS when idle.
 

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Sharpy said:
It seems that if I put it on High Performance Mode it keeps it at the speed you set it in BIOS when idle.
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Yes, it will do it automatically if your doing something demanding. I do that when gaming so it won't try and lower.

You can use those for a few neat things. I have mine so power saver is locket at 40% cpu which=1.7ghz, for downloading. Then I set balanced to go from 1.7(40%) up to 3.5(85%)
 
Speedeu4ia said:
Yes, it will do it automatically if your doing something demanding. I do that when gaming so it won't try and lower.

You can use those for a few neat things. I have mine so power saver is locket at 40% cpu which=1.7ghz, for downloading. Then I set balanced to go from 1.7(40%) up to 3.5(85%)
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Ok so I have version 26.6 do I just do the Small FFTs test? For how long?

I just did the test and it reached 75C and stayed there with version 26.6. Stayed at 4.5GHz
Did the test again with new version 29.4b8 same result just a touch cooler at 73C-74C clocks down from 4.5GHz to 4.3GHz

Got 80C-81C with 4.6GHz and v26.6 Prime.
 
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Sharpy said:
Ok so I have version 26.6 do I just do the Small FFTs test? For how long?

I just did the test and it reached 75C and stayed there with version 26.6. Stayed at 4.5GHz
Did the test again with new version 29.4b8 same result just a touch cooler at 73C-74C clocks down from 4.5GHz to 4.3GHz

Got 80C-81C with 4.6GHz and v26.6 Prime.
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Well for stability people run it for up to 24hrs, kinda excessive

Anyway for temps you prob need to run it for 30mins to an hr

Can try and lower vcore to get better temps. Play some games or whatever and see how the temps do and what your comfortable with
 
Speedeu4ia said:
Well for stability people run it for up to 24hrs, kinda excessive

Anyway for temps you prob need to run it for 30mins to an hr

Can try and lower vcore to get better temps. Play some games or whatever and see how the temps do and what your comfortable with
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How low of a vcore should I start with for 4.5GHz - 4.7GHz
 
I wouldn't worry for 85C. The tjmax is 100C and thermtrip is 135C.
 
Speedeu4ia said:
1.28v at 4.8 is the sweet spot for me
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i don'r know dog the chip out....try to....should run a long time...at even that...it's the ones that went alittle further past 1.4v....that other chip got smoked....left it on prime for like 2 or 3 days at 1.45v and pegged 100c....started benching a lot worse.
 
Batboy88 said:
i don'r know dog the chip out....try to....should run a long time...at even that...it's the ones that went alittle further past 1.4v....that other chip got smoked....left it on prime for like 2 or 3 days at 1.45v and pegged 100c....started benching a lot worse.
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That's where I'm at with mine and it's stays mostly away from 82c with a H115i running Aida.

If a core hits low 80's now and then it's fine.

When I pushed to 5ghz more core wanted to live there, and the package was hotter.

For what it is, and what I'm doing, it's fine.

I'm more interested in keeping my GPU in the 50's in long gaming sessions.
 
somebrains said:
That's where I'm at with mine and it's stays mostly away from 82c with a H115i running Aida.

If a core hits low 80's now and then it's fine.

When I pushed to 5ghz more core wanted to live there, and the package was hotter.

For what it is, and what I'm doing, it's fine.

I'm more interested in keeping my GPU in the 50's in long gaming sessions.
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yeah pretty much been seeing 80-85c every now and then for awhile now and that's fine. just about anything at that is gonna wanna run that hot...idk try another block...or need trying make an awesome one with like 3/4" or something.
 
Batboy88 said:
yeah pretty much been seeing 80-85c every now and then for awhile now and that's fine. just about anything at that is gonna wanna run that hot...idk try another block...or need trying make an awesome one with like 3/4" or something.
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I don't have the #'s on hand, but the impression I got 4.9+ is that my parts will go farther but the vrm temps tell me that my Prime board is a Toyota Tacoma trying to be a Sprinter.

It takes $ to turn a daily driver Civic into a 8.75-sec 1/4mi car.

The value I'm getting out of my setup at 4.8 is pretty good for the $.
I can't see dumping in 40% total purchase price to get 4.9-5.0.5.1+ worth it for my use case.

Later I'll build out a big pimpin drag race build but it ain't gonna make Atom, AWS console, SQL Bench, MS Office, Chrome, and Fortnite run any better.

It will be neat to take pics of my $$$$ clockers mobo and Nickelodeon colored loop ;)
 
Sharpy said:
Do I override the vcore or put it on adaptive?
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Try adaptive if you want to keep the stock power management (lowering clocks and vcore at idle)

Then you should have an option for offset, this is where you can add or subtract vcore, and play with LLC.

Mine overvolted with adaptive to like 1.33v so I ended up with -.050v offset. Yours may be as it should so you may have to have a plus offset to get it to 1.28v

Basically just set to adaptive and 4.5ghz and run p95 and look what the vcore is( not the vid as it's a separate reading), and go from there
 
CPU in BIOS is on adaptive and bounces from 0.536 to 0.544 but stays on 0.544 longest while running Prime95. Why am I only getting half a volt in HWMonitor?
 

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Seems that the program isn't reporting correctly for my motherboard. Anyway to get the correct voltage reading? I dont know what to really look for.. CPU VCORE only shows 0.544v at full load...
 

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Batboy88 said:
you already almost hit 80c on the first core...about where i'm at a lot at 5ghz and 1.4v.
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How do I get the program to report the correct voltage since its on Auto in BIOS? I wanted to know what its giving on Auto.
 
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