Slight increase in GPU tempertaure after PSU replacement. Is it anything to be concerned over?

puggy718 · May 11, 2016

Hey everyone,

I recently replaced a Delta OEM 850w psu with a Delta OEM 1500w (They're both made for the Alienware Area 51 R2) and I've noticed a slight increase in GPU (980 Ti) idle temps from 28/29c to 31/32c. Now, I know that these temps are perfectly fine for the 980 Ti and it's obviously in no danger of overheating by a country mile. However, I'm curious as to what might be responsible for this slight increase in temperature. I've noticed other sensors are giving slightly higher temps than before as well.

The PSU itself is quiet (no rattling or clicking) and I'm not experiencing any freezes, crashes or spontaneous reboots, so I'm assuming it's in good working order. Could it be that the 1500w simply consumes more power itself and is emitting more heat inside my case than the 850w did?

Thanks in advance.

Other specs:

CPU: 5820k OC'd to 3.8 ghz
32 GB DDR4
GPU: Nividia GTX 980 Ti
Storage: 1x 512 SSD + 4TB WD hdd

Robert Cook · May 11, 2016

I think it is as you think, a larger unit will inevitably put out extra heat, and if its fan is not as good or exhausts differently, then temps change. running some system tests cannot hurt, but I think there is no issue.

puggy718 · May 11, 2016

Robert Cook :

Robert,

Thanks for the quick reply. What system test would you recommend? I've already run a GPU & CPU stress/bench test with CPU-Z, and I also ran Heaven Benchmark 4.0 for 30 minutes (I figured if it could survive that without crapping the bed, the psu should be okay). Is there a good stress test specifically designed for psu's?

Thanks again.

puggy718 · May 11, 2016

I forgot to mention. The power cord I'm using is not the original that Dell includes with the 1500w 800GY. It's a C19 (300v, 14 AWG) cord that I purchased separately. Could that be the cause?

Robert Cook · May 11, 2016

not really, and as that is such a high wattage PSU, getting it to run at full load is impossible with that hardware. I would say that benchmark is evidence enough that it is okay.

k1114 · May 11, 2016

Higher rating doesn't mean it'll put out more heat and the system is still taking the same amount of power. What could be affected is efficiency which would be lower since you are using less of the total assuming it's the same psu platform. But at idle, the power lost to heat isn't much and I don't think that's enough to cause a 3c change. Stress testing would put similar temps. Did load temps change?

Robert Cook · May 11, 2016

k1114 :

at idle a 1500W PSU would be running at rather low efficiency. couple that with the fact that is probably changed air flow, and temps move. Where else could the heat come from?

puggy718 · May 11, 2016

I think I found the problem. It might be the Alienware Command Center software itself. I'm not sure if it's giving accurate readings. It's showing my GPU temp at varying between 32/33c while MSI Afterburner is showing it varying 30/31c over the same period. Now I'm not sure which to believe.

Robert Cook · May 12, 2016

hmmm. I have never dealt with alienware command center. I find MSI afterburner is pretty good for GPU temps.

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Slight increase in GPU tempertaure after PSU replacement. Is it anything to be concerned over?

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