New PSU Increase CPU Temp (?)

[vyneta]

Hi,

 

Recently I got a shortage in my house and it seems come from my PC. It is a very old rig with Silver Power SP-SS500 PSU. Thus, I replace it with Corsair HX750. I choose the Corsair because I am planning to build a whole new PC by the end of the year. Anyway, I use Intel Q9650, when I tried to benchmark it using CINEBENCH R15, it got throttled so bad. Previously when I use my old PSU, the highest temp was 88 degree, but with the new one it reached 99 degree and throttled. I did not change anything from the rig, Everything is the same. Below is my rig detail:

-Intel Q9650

-GTX 650 TI

-8GB 800Mhz Memory

-4x120mm fan

-A set of gaming keyboard and mouse

-A webcam

 

Is it possible that when I use the old PSU, it can't provide proper power to the CPU and make the temp lower? The idle temp and ambience temp is same.

[Terabyte_272]

Well whats probably happening is that your old psu could not or would not supply enough power so your cpu never got to is max speed so thats why its hotter

[Terabyte_272]

Also your cpus thermal paste may be old or you just have a bad cpu cooler

[vyneta]

1 minute ago, Terabyte_272 said:

Also your cpus thermal paste may be old or you just have a bad cpu cooler

I changed the paste recently using Arctic Mx 4 and did not touch the CPU when changing the PSU, I am not sure though about the CPU fan, it is an old stock cooler. It might be the reason.

[Fasauceome]

6 minutes ago, vyneta said:

I changed the paste recently using Arctic Mx 4 and did not touch the CPU when changing the PSU, I am not sure though about the CPU fan, it is an old stock cooler. It might be the reason.

The old stock Intel coolers are good, as long as it's one of the tall ones with the decent fan.

[FuzzyLogic]

I had a similar problem when switching from an older EVGA power supply to a new one from Corsair. It stemmed from the fact that the fan in the EVGA model is temperature controlled, while the one in the Corsair model is load controlled, so the Corsair's fan speed stayed pretty much constant which didn't allow heat to escape as quickly. Can you check if there's any dust in your CPU cooler?

[seon123]

3 hours ago, thegreengamers said:

It stemmed from the fact that the fan in the EVGA model is temperature controlled, while the one in the Corsair model is load controlled, so the Corsair's fan speed stayed pretty much constant which didn't allow heat to escape as quickly

Pretty much all PSUs have their fans temperature controlled. EVGA branded PSUs just tend to have excessively aggressive fan curves. 

For example, the G3 850W runs its fan at 1690RPM at a 255W load. The much lower end Corsair CX450 (CWT) runs its fan at 1290RPM at 270W.

The temperature increases with the load. 

[vyneta]

On 9/14/2018 at 12:01 AM, fasauceome said:

The old stock Intel coolers are good, as long as it's one of the tall ones with the decent fan.

 

On 9/14/2018 at 12:25 AM, thegreengamers said:

I had a similar problem when switching from an older EVGA power supply to a new one from Corsair. It stemmed from the fact that the fan in the EVGA model is temperature controlled, while the one in the Corsair model is load controlled, so the Corsair's fan speed stayed pretty much constant which didn't allow heat to escape as quickly. Can you check if there's any dust in your CPU cooler?

 

I just realize that the stock cooler that I used is for Core 2 Duo CPU. After I changed the cooler, the CPU temp is fine now.