- Jul 12, 2018
- 2
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I came across a situation that I do not understand so I thought I would ask here to see if anyone can help me out. We built a PC with the specs below as a workstation PC:
System 1 -
CPU: i7-8700 (stock cooler)
MB: ASRock Z370 Pro4
RAM: G.SKILL Ripjaws 4X8GB DDR4 2400
GPU: GTX 1060 6GB
Drive: WD Black 256GB M.2
Case: Corsair Carbide 200R
PS: EVGA 500W
I was watching the temps using HWINFO and noticed that even under medium use I was seeing thermal throttling. With just a few applications open, the temps were around 30 deg C. If I ran a Prime95 test, it would take about 1 minute and the CPU was at 95 deg C or more and thermal throttling. Good airflow was a thought I had as to why we were having the issue. There is only a 120MM fan in the front and a 120MM in the rear. I added two more 120MM on the top, but that didn't change much. When we needed to build another system I did some research and decided a different case was in order as I wanted to improve airflow, but also get a case with better dust filtration. The specs for this system are listed below.
System 2
CPU: i7-8700 (Cryorig H7 - thermal compound applied in a line)
MB: Gigabyte H370M D3H
RAM: Corsair Vengence LPX 2X16GB DDR4 2400
GPU: Quadro P1000
Drive: WD Black 256GB M.2
Case: Fractal Design MicroATX Define Mini C
PS: Corsair TX550M
I also bought an extra 140MM fan so the setup is a 140MM and a 120MM in the front, a 120MM in the back, and nothing in the top. After building this system out I tested thermals and was quite pleased. Temps were around 30 deg C with a few applications open. The difference was under Prime95 I was seeing a max temp of 58-60 deg C even after 10 minutes of solid running. I was quite pleased and thought it was due to the Cryorig H7 so I purchased another one and installed that on the first system, and also applied thermal compound in a line. I was rather shocked to find that temps just climbed right past 60 and after about 7 to 8 minutes I was up at 95 deg C and thermal throttling again. So much better, but still not the same.
Now I was really baffled so I dug into the differences.
System 1 got a 1392 Cinebech R15 score. System 2 got a 1301 Cinebech R15 score.
System 1 max voltage is 1.445 and max clock of 4.6 GHz. System 2 max voltage is 1.269 and max clock of 4.3 GHz.
I went back and looked at the motherboard specs as that is the main difference that matters (in my mind) between the two systems. I cannot see any major difference between the two. I know the Z370 has overclocking ability but with a non-k cpu I didn't figure that would matter.
My main question here is how would I have known up before purchasing that I would not be hitting the full 4.6 GHz with the H370M D3H motherboard? Is there a way to change this? Any other recommendations for going forward?
System 1 -
CPU: i7-8700 (stock cooler)
MB: ASRock Z370 Pro4
RAM: G.SKILL Ripjaws 4X8GB DDR4 2400
GPU: GTX 1060 6GB
Drive: WD Black 256GB M.2
Case: Corsair Carbide 200R
PS: EVGA 500W
I was watching the temps using HWINFO and noticed that even under medium use I was seeing thermal throttling. With just a few applications open, the temps were around 30 deg C. If I ran a Prime95 test, it would take about 1 minute and the CPU was at 95 deg C or more and thermal throttling. Good airflow was a thought I had as to why we were having the issue. There is only a 120MM fan in the front and a 120MM in the rear. I added two more 120MM on the top, but that didn't change much. When we needed to build another system I did some research and decided a different case was in order as I wanted to improve airflow, but also get a case with better dust filtration. The specs for this system are listed below.
System 2
CPU: i7-8700 (Cryorig H7 - thermal compound applied in a line)
MB: Gigabyte H370M D3H
RAM: Corsair Vengence LPX 2X16GB DDR4 2400
GPU: Quadro P1000
Drive: WD Black 256GB M.2
Case: Fractal Design MicroATX Define Mini C
PS: Corsair TX550M
I also bought an extra 140MM fan so the setup is a 140MM and a 120MM in the front, a 120MM in the back, and nothing in the top. After building this system out I tested thermals and was quite pleased. Temps were around 30 deg C with a few applications open. The difference was under Prime95 I was seeing a max temp of 58-60 deg C even after 10 minutes of solid running. I was quite pleased and thought it was due to the Cryorig H7 so I purchased another one and installed that on the first system, and also applied thermal compound in a line. I was rather shocked to find that temps just climbed right past 60 and after about 7 to 8 minutes I was up at 95 deg C and thermal throttling again. So much better, but still not the same.
Now I was really baffled so I dug into the differences.
System 1 got a 1392 Cinebech R15 score. System 2 got a 1301 Cinebech R15 score.
System 1 max voltage is 1.445 and max clock of 4.6 GHz. System 2 max voltage is 1.269 and max clock of 4.3 GHz.
I went back and looked at the motherboard specs as that is the main difference that matters (in my mind) between the two systems. I cannot see any major difference between the two. I know the Z370 has overclocking ability but with a non-k cpu I didn't figure that would matter.
My main question here is how would I have known up before purchasing that I would not be hitting the full 4.6 GHz with the H370M D3H motherboard? Is there a way to change this? Any other recommendations for going forward?
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