Fans RPM slows down when PC is under load?

Liam · 15 Mar 2013 at 17:57

Hi all,

When I run a stress test or even surf the Internet, when my PC is under load my case fans RPM drops and so does the PSU fan?

I know my processor sits at 1.6Ghz and then goes to 3.8Ghz on demand but should both my case fans and PSU fans slow down? It's only slightly but enough to take notice of and actually hear them,

Thanks all

dacads · 15 Mar 2013 at 18:00

You hear them get quieter?

Under load fans should be getting louder and increasing in RPM

snips86x · 15 Mar 2013 at 18:04

What PSU do you have?

Have you attempted to run Prime95 to see if there are any stability issues?

Liam · 15 Mar 2013 at 18:04

dacads said:
You hear them get quieter?

Under load fans should be getting louder and increasing in RPM

Yeah. I only have one case fan attached at the moment as it's a new build. Could the PSU be at fault?

Liam · 15 Mar 2013 at 18:06

snips86x said:
What PSU do you have?

Have you attempted to run Prime95 to see if there are any stability issues?

It's a Silverstone Strider PLUS 600W Full Modular. Ran Prime95 only for a few minutes to test temperatures etc. When I didn't have any case fans at all, you could hear the PSU's fan slowing down and speeding up ever so slightly too.

Genoma · 16 Mar 2013 at 08:49

sounds like a power issue, is it connected to a fan controller?

Liam · 16 Mar 2013 at 19:16

Genoma said:
sounds like a power issue, is it connected to a fan controller?

It's a motherboard setting mate. Intel chips are underclocked to 1.6Ghz (Well, my i5 is anyway) until the PC actually needs the power, then ramps it up to 3.6Ghz which causes the fans to whir up and down.