[CPU] Prime95 OR CPU Cooler

[xDylanio]

Okay well I ran into a problem yesterday while trying to overclock. I checked on prime95 and my temps were super hot. It reached around 100c. It stayed around 80c to the high 90c. I've looked around and i've come up with 2 reasons this might happen.

 

1) The most obvious, It might be my cpu cooler. A h100i gtx. It seems that it isn't doing well anymore, and that it could be the reason it makes the cpu really hot.

 

a) The cpu cooler isn't seated properly. I've searched online and found this 

b) It might not be my cpu cooler, just that it's a cpu thing in general (for mine)

 

2) Its prime95, this might be it, I run aida64 and get 60c temps.

 

Post saying they fixed it thru cpu cooler : http://www.tomshardware.com/answers/id-2202320/prime-overheating-4790k.html

Post saying it's normal : http://www.tomshardware.com/answers/id-2217255/4790k-prime95-overheats.html

[Guest]

a) Go reseat it then or/and replace thermal paste

b) It shouldn't get that high

c) Prime95 ran fine for me with a stock cooler

 

[xDylanio]

1 minute ago, deXxterlab97 said:

a) Go reseat it then or/and replace thermal paste

b) It shouldn't get that high

c) Prime95 ran fine for me with a stock cooler

 

c) you used a i7 4790k?

[Guest]

Just now, xDylanio said:

c) you used a i7 4790k?

No but the temps were fine for me so Prime95 is not really an issue, also looking at other people with 4790k and ran prime95 it was fine too

Try running wPrime or Aida64 if you are unsure

[JoostinOnline]

2 minutes ago, deXxterlab97 said:

a) Go reseat it then or/and replace thermal paste

b) It shouldn't get that high

c) Prime95 ran fine for me with a stock cooler

 

You don't have a 4790K though.  It runs super hot.

 

@xDylanio The voltage is much higher than it needs to be by default.  Install Intel Extreme Tuning Utility.  Set the voltage to manual and change it to 1.15.  Raise or lower it depending on if it can go 10 minutes of Prime95 without crashing.

[JoostinOnline]

2 minutes ago, deXxterlab97 said:

No but the temps were fine for me so Prime95 is not really an issue, also looking at other people with 4790k and ran prime95 it was fine too

Try running wPrime or Aida64 if you are unsure

Not true.  I've got the same CPU.

[Guest]

Just now, JoostinOnline said:

You don't have a 4790K though.  It runs super hot.

Shouldn't be 100 degree hot though, especially with a h100i

 

http://www.guru3d.com/articles_pages/corsair_h100i_gtx_review,11.html

 

[xDylanio]

3 minutes ago, deXxterlab97 said:

No but the temps were fine for me so Prime95 is not really an issue, also looking at other people with 4790k and ran prime95 it was fine too

Try running wPrime or Aida64 if you are unsure

i ran aida 64 and get 60 c

 

1 minute ago, JoostinOnline said:

You don't have a 4790K though.  It runs super hot.

 

@xDylanio The voltage is much higher than it needs to be by default.  Install Intel Extreme Tuning Utility.  Set the voltage to manual and change it to 1.15.  Raise or lower it depending on if it can go 10 minutes of Prime95 without crashing.

Alright ill do that

 

1 minute ago, JoostinOnline said:

Not true.  I've got the same CPU.

Can you install prime95 and send a screenshot of your results

[JoostinOnline]

Just now, xDylanio said:

Can you install prime95 and send a screenshot of your results

If I go to 1.2V or higher Prime95 takes the temperatures in to the 90s.  By default it uses like 1.23V or something.

[JoostinOnline]

8 minutes ago, deXxterlab97 said:

Shouldn't be 100 degree hot though, especially with a h100i

 

http://www.guru3d.com/articles_pages/corsair_h100i_gtx_review,11.html

 

They clearly only ran it for a few minutes.  Water coolers eventually reach almost the same temps as air coolers.

 

Edit: Found a video

 

Edited March 14, 2017 by JoostinOnline

[bgibbz]

2 minutes ago, JoostinOnline said:

They clearly only ran it for a few minutes.  Water coolers eventually reach almost the same temps as air coolers.

This isnt true. Why would the effecieny of a cooler change over time, other than improve as fan speed changes? 

[JoostinOnline]

Just now, bgibbz said:

This isnt true. Why would the effecieny of a cooler change over time, other than improve as fan speed changes? 

Watch the video, it does a good job of explaining it.

[Mira Yurizaki]

Just now, bgibbz said:

This isnt true. Why would the effecieny of a cooler change over time, other than improve as fan speed changes? 

All a water cooler does is increase your heat capacity. The system can reach an equilibrium temperature close to that of an air cooler depending on how fast the radiator can dump heat.

[JoostinOnline]

1 minute ago, M.Yurizaki said:

All a water cooler does is increase your heat capacity. The system can reach an equilibrium temperature close to that of an air cooler depending on how fast the radiator can dump heat.

They're usually a little lower because they have giant fans, but yeah.

[bgibbz]

Just now, M.Yurizaki said:

All a water cooler does is increase your heat capacity. The system can reach an equilibrium temperature close to that of an air cooler depending on how fast the radiator can dump heat.

Sure, I understand conservation of energy. However, isn't the idea behind liquid coolers that we can extend the dissipation area by moving it away from the CPU? I understand single rad liquid coolers not being much different from an air cooler, but a double rad should have more surface area and thus more thermal dissipation than an air cooler. 

[JoostinOnline]

2 minutes ago, bgibbz said:

Sure, I understand conservation of energy. However, isn't the idea behind liquid coolers that we can extend the dissipation area by moving it away from the CPU? I understand single rad liquid coolers not being much different from an air cooler, but a double rad should have more surface area and thus more thermal dissipation than an air cooler. 

They're thin though. They really don't have that much surface area compared to a decent air cooler.

[knightslugger]

@xDylanio I de-lidded and replaced the Intel TIM with CLU and my temps dropped over 20*C under full RealBench loads. maybe you could stand to do the same?

[Mira Yurizaki]

6 minutes ago, bgibbz said:

Sure, I understand conservation of energy. However, isn't the idea behind liquid coolers that we can extend the dissipation area by moving it away from the CPU? I understand single rad liquid coolers not being much different from an air cooler, but a double rad should have more surface area and thus more thermal dissipation than an air cooler. 

I can't seem to find a weight spec, but I'm pretty certain that a 240mm radiator has almost the same amount of material as say a Cooler Master EVO and a similar surface area.

[JoostinOnline]

1 minute ago, M.Yurizaki said:

I can't seem to find a weight spec, but I'm pretty certain that a 240mm radiator has almost the same amount of material as say a Cooler Master EVO and a similar surface area.

I owned a 212 Evo, and I'd say that's a fair estimate.  I just upgraded to a badass Cryorig R1 Ultimate.  I was sure it was going to snap my motherboard when I installed it.

[done12many2]

1 hour ago, JoostinOnline said:

They clearly only ran it for a few minutes.  Water coolers eventually reach almost the same temps as air coolers.

 

Agreed.  This is typical of an AIO water cooler.  Not so much with larger custom loops though.  It's as if AIOs are just big enough to start to make a difference, but can't keep it there long.

[JoostinOnline]

10 minutes ago, done12many2 said:

 

Agreed.  This is typical of an AIO water cooler.  Not so much with larger custom loops though.  It's as if AIOs are just big enough to start to make a difference, but can't keep it there long.

Custom loops have a lot more water.  I bet if you ran Prime95 for long enough it would reach temps similar to air coolers and AIO units.

[xDylanio]

1 hour ago, deXxterlab97 said:

a) Go reseat it then or/and replace thermal paste

b) It shouldn't get that high

c) Prime95 ran fine for me with a stock cooler

 

 

1 hour ago, JoostinOnline said:

If I go to 1.2V or higher Prime95 takes the temperatures in to the 90s.  By default it uses like 1.23V or something.

 

Okay this has to be a joke. I ran prime 95 after doing all of the new installations, it was around 60 c, I start it up again 90c. I'm going to say it's prime95

[JoostinOnline]

1 minute ago, xDylanio said:

 

 

Okay this has to be a joke. I ran prime 95 after doing all of the new installations, it was around 60 c, I start it up again 90c. I'm going to say it's prime95

Prime95 stresses the hell out of it.  That's why it's called a torture test.  Try running the Intel XTU benchmark and seeing what it goes to.  It isn't as strong as the Prime95 torture test, but it shows temps and thermal throttling.

[xDylanio]

1 minute ago, JoostinOnline said:

Prime95 stresses the hell out of it.  That's why it's called a torture test.  Try running the Intel XTU benchmark and seeing what it goes to.  It isn't as strong as the Prime95 torture test, but it shows temps and thermal throttling.

Yea ever since I got suggested to use it ive been using it.  The highest was 70, but it was around the high 50's and low 60's

[porina]

What is the overclock condition? I'm 50/50 here on it being the OC settings, or possibly bad contact with the AIO.

 

For comparison, my old 6700k @ 4.2 GHz 1.25v typically runs below 60C running 24/7 with a H110i GTX (280mm) and prime number finding tasks comparable in stress to prime95 (it uses the same math code). If you start turning up the voltage, it gets hotter much faster. I currently have a different 6700k system, also at 4.2 GHz 1.25v, with a Silverstone 120mm AIO, and that runs around 70C doing the same work 24/7.

 

My H110i GTX I really hate and I don't use it any more after going custom loop. There is something about the mounting mechanism that just doesn't work well and I can see significant variations in temperature, getting better if I loosen the mounting screws! I suspect there is excessive load causing a bent CPU substrate pulling the die from IHS. Also the tubing is very thick and exerts quite a force onto the mount depending on where the rad ends up. It works great on open test bench, but gives me no end of problem if I try to use it in a case.