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I4770K and H100i Cooler

D

davidst99

Senior member
Hi,

I ran a few tests on my I7 4770K and H100i cooler and below are my results. The temperatures are higher then they should be:

3.5 Ghz
Idle
.9V
Corsair CPU - 28C
Corsair H100i - 26C
Gigabyte - 20C
Real Temp - 32C, 32C, 31C, 29C

Prime95 Blend
1.3V
Corsair CPU - 60C
Corsair H100i Temp - 30C
Gigabyte - 49C
Real Temp - 65C, 63C, 63C, 60C

Prime95 Small FFT
1.3V
Corsair CPU - 83C
Corsair H100i - 31.7C
Gigabyte - 74C
Real Temp - 86C, 85C, 84C, 79C


3.8 Ghz
Idle
.9V
Corsair CPU - 31 C
Corsair H100i Temp 27C
Gigabyte - 23 C
Real Temp - 33, 31, 33, 30

Prim95 Blend
1.415V
Corsair CPU - 65C
Corsair H100i - 29.6C
Gigabyte - 59C
Real Temp - 73C, 71C, 70C, 68C

Prime95 Small FFT
1.415V
Corsair CPU 100C
Corsair Temp 33.9C
Gigabyte - 91C
Real Temp - 104C, 104C, 99C, 95C
(drops down to 3.7 GHZ)


4.0 Ghz
Idle
.9 V
Corsair CPU - 33C
Corsair H100i - 29.4C
Gigabyte - 22 C
Real Temp 36C, 35C, 33C, 32C

Prime95 Blend
1.448V
Corsair CPU - 71C
Corsair H100i - 31.3C
Gigabyte - 62C
Real Temp 76C, 77C, 75C, 74C

Prime95 Small FFTs
1.415V
Corsair CPU - 100C
Corsair H100i - 33.8C
Gigabyte - 91C
Real Temp - 105C, 104C, 100C, 92C
(drops down to 3.78 GHZ)


4.2 Ghz
Idle
.91-1V
Corsair CPU 33 C
Corsair H100i - 28.8C
Gigabyte 23 C
Real Temp 35C, 34C, 34C, 33C

Prime95 Blend
1.448V
Corsair CPU 72C
Corsair H100i - 30.7C
Gigabyte 64C
Real Temp - 77C, 77C, 74C, 72C

Prime95 Small FFTs
1.415V
Corsair CPU 98C
Corsair H100i - 33C
Gigabyte - 91C
Real Temp - 105C, 101C, 100C, 91C
(drops down to 3.78 GHZ)


Could this be an issue with my CPU or Cooler? It's strange that the H100i doesn't change temperature. Thanks for any help.

David
 
Your voltages are way too high. 1.25V (best) or 1.275V (VERY YMMV) is preferred max on Haswell. 1.3V+ is ungodly high and yes your temps will be too high at 1.3V. I get 4.5ghz @ 1.25V with temps hovering around 80C during stress testing, but in actual use my temps are never that high. Not even past 55C in most cases.

The base voltage is around 1V for Haswell at stock.....basically, you're overshooting on voltage. 1.3V+ is stupid high for the 4770k.
 
Like everyone else says the voltage is far too high. Anything above 1.3v should be a concern imho. I'm at 1.25v btw.
 
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I was using Gigabyte Easy Tune and it set the VCORE to 1.4V. I am able to get to 4.3 at 1.24V when I manually set the BIOS and get around 83C. I think that's the best I'm going to able to do.
 
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davidst99 said:
I was using Gigabyte Easy Tune and it set the VCORE to 1.4V. I am able to get to 4.3 at 1.24V when I manually set the BIOS and get around 83C. I think that's the best I'm going to able to do.
Click to expand...


Easy Tune will give high voltage, manually over clock in the bios should help. Not sure which board you have..........Auto voltage should get you around 4.5. Then check temps adjust V core lower(if you can) then stress.
What CPU settings are you using in the Bios? Leave everything on till you want to go higher than 4.5 IMHO.
 
The plot thickens. Apparently Z97 has a higher voltage threshold with the 4770k than the Z87. Read the Asus Z97 deluxe review at HardOCP.

I guess it depends on which platform you're on. But in any case, i'd judge stability with real world use and not prime95. Prime95 skews things because it increases voltage automatically by .1V when using AVX.

If you're using Z87 the best point is 1.25V or lower in my experience. Beyond that your temps will enter silly territory. Z97 has a higher threshold for some reason, I do not know why.
 
I currently have a Z97 Gigabyte Gaming 7 motherboard. People suggested I try to use Noctua NT-H1 thermal paste. I'm using Artic Silver 5 right now. Do you think it's worth exchanging the CPU itself? I have 15 days to take it back.

I been testing with Prime95 SSW (I think that's what's it's called). Is that an actual real world testing solution? I can clock higher and be stable in the Blend mode at the same temperature.

Thanks again for all the replies. They are very helpful. I wished I just kept my I5 3570K 🙂

David
 
I'd say just use whatever overclock you get because in the end, you're wrangling with something that won't make a real perceptible difference in well............anything. I really don't know what voltage to shoot for on Z97. Perhaps read some Z97 motherboard reviews and go from there. Keep in mind that stress testing temps are NOT real world temps. Not even close. Your real world temps will be far far lower, especially since AVX instructions cause an autocorrection in voltage (+.1V). Prime95 temperatures are essentially nearly meaningless on Haswell CPUs. Prime 95 has its place but I have not ever run any workload that has ever replicated those temps. My temps are always a good 30-40C lower.
 
blackened23 said:
I'd say just use whatever overclock you get because in the end, you're wrangling with something that won't make a real perceptible difference in well............anything. I really don't know what voltage to shoot for on Z97. Perhaps read some Z97 motherboard reviews and go from there. Keep in mind that stress testing temps are NOT real world temps. Not even close. Your real world temps will be far far lower, especially since AVX instructions cause an autocorrection in voltage (+.1V). Prime95 temperatures are essentially nearly meaningless on Haswell CPUs. Prime 95 has its place but I have not ever run any workload that has ever replicated those temps. My temps are always a good 30-40C lower.
Click to expand...

Thank you for the advice. I'm going to stop worrying about it and be happy and be happy at 4.2 ghz. I have two GTX 670s and mainly play games and a little video encoding. I think they will have more of an impact in performance then the CPU clock speed if I'm not mistaken.

David
 
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