Stress Testing - Is this a good result ?

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George_Florian

Honorable
Feb 14, 2017
99
0
10,640
1.
Hello there !

I recently had some problems with my PC and it turned out that a RAM module wasn't working properly and I will ship it to guaranty. But the guys at the PC Service told me that my Corsair Hydro Series 115i isn't working at all: the fans don't work, that the CPU stays at over 90 C. They also said that the Power LED is orange because it signals a problem and I looked it up and that is just a StandBy Power Led that doesn't tell you anything about the components.

I couldn't believe that and I took the PC home. The RAM is indeed defective but the Corsair Cooler works just fine. The fans work, and currently, as I type this I'm doing a Prime 95 test using Small FFTs.

This guy on youtube: https://www.youtube.com/watch?v=1jJfG5Gzh_c has the same CPU and Cooler as me and is doing the same test. The difference is that his CPU is OC-ed to 4.8 while mine is at stock 4.5. Also his temperatures don't go over 75 C but mine are between 85 C and 95 C and rising.

EDIT: After 20 minutes of testing the temps reached 99 and I closed the tests. Immediately the temps dropped to 45 C and kept dropping to 35-40 C. How did it cool off so fast ?

Idle temperature is 35-40 C.

I don't have anymore time for further testing because the courier will be here any minute to take my RAM away and I need to ship both 8 GBs of module and, as you know, the PC won't start without RAM memory.

So what is really going on here ? Is the Corsair Cooler defective or not ?

2. Testing:

https://image.ibb.co/hW8MKx/test1.jpg

https://image.ibb.co/nrZp6c/Test_2.jpg

The testing was done while both side panels of the case were removed. The case was fully opened.

3. Case fans and their rotation direction:

https://image.ibb.co/izv7sH/1.jpg -> Back / Left
https://image.ibb.co/kvRrKx/2.jpg -> Up
https://image.ibb.co/fJQU6c/3.jpg -> Front / Right

https://image.ibb.co/ncHyzx/4.jpg

4. PC Specs:

Motherboard: ASUS STRIX Z270E GAMING
CPU: Intel Kaby Lake, Core i7 7700K 4.20GHz
CPU Cooler: Corsair Hydro Series H115i Extreme Performance
Case: NZXT H440 New Edition (White)
RAM: Corsair Vengeance 2x8GB DDR4 3000MHz CL15 White LED Dual Channel Kit
HDD: WD Black 1TB SATA3 7200RPM 64MB
SSD: Samsung 850 PRO 256 GB
PSU: Corsair RMx Series RM750x 750W, 80+ Gold
GPU: GIGABYTE GeForce GTX 1080 G1 GAMING 8GB DDR5X 256-bit
 
Solution
M
96C is right on the 'almost horrendous' portion of the scale....with throttling being the next step.

Prime95, however, is much worse than typical workloads, and is a true worst case scenario....; as your fluid warms up, the CPU then cannot be cooled as well, which leads to warmer fluid, etc...(if you use Prime 95, use version 26.6 which is less torturous than later versions)

Try the AIDA64 stress test, which, based on my sample 7700K, gives only about 1-2C warmer temps than those encountered on BF1, for example...; no other games typically generate more CPU stress that I am aware of...
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miron.82

Apr 5, 2018
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Here are some possible issue with your build:
1. You heatsink install is not so good. The thermal paste might be dry. You can redo the paste.
2. The case might by not sufficiently ventilated. To rule this out, try removing case doors and see how temperatures are affected. That way you will measure you cooler performance without case getting in the way.

Right now try removing case doors and see what happens.
 
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grimfox

Distinguished
Jun 2, 2009
1,030
50
19,840
Those temps are too high. I had a 110i and it could hold the temps on my OCed 6600k down to the low 50s with the fans running in "balanced" mode.

I agree with miron.82 the mounting is potentially at fault. Corsairs mounting mechanism is usually pretty good but not impossible to get wrong. I can recall anything specifically but while rare I think the pump on the corsair units does have a tendency to fail.
 
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mdd1963

Titan
Jan 14, 2006
16,616
1,735
81,240
96C is right on the 'almost horrendous' portion of the scale....with throttling being the next step.

Prime95, however, is much worse than typical workloads, and is a true worst case scenario....; as your fluid warms up, the CPU then cannot be cooled as well, which leads to warmer fluid, etc...(if you use Prime 95, use version 26.6 which is less torturous than later versions)

Try the AIDA64 stress test, which, based on my sample 7700K, gives only about 1-2C warmer temps than those encountered on BF1, for example...; no other games typically generate more CPU stress that I am aware of...
 
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