Fan speed makes next to no difference?

[powerplayer75]

It seems that having my CPU fan speed at 100% makes at most a 3C-5C difference than having it at 35%. Is this normal? I thought I should expect at least a 10C difference for the CPU fan speed being near off and at max

 

I'm running on following:

i5 3570k @ 4.3 GHz on 1.35V (I know this is insanely high for this processor but it occasionally crashes without this much)

Hyper 212 Evo with 1 push fan

2 negative airflow fans

2 positive airflow fans

 

On Prime95 on Small FFTs I get in the high 80s and low 90s (yeah this is awful but I never actually see these temps in anything I do)

On idle it hovers in the 40s

[WoodenMarker]

What are temps at 35% and 100%? The cpu could be throttling due to high temps. 

Are case fans speeds also being raised?

[powerplayer75]

1 hour ago, WoodenMarker said:

What are temps at 35% and 100%? The cpu could be throttling due to high temps. 

Are case fans speeds also being raised?

so i just re-tested it, and I got exclusively mid-high 90s for 35 but on 100 I got fluctuations between high 80s and mid-high 90s.

[WoodenMarker]

19 hours ago, powerplayer75 said:

so i just re-tested it, and I got exclusively mid-high 90s for 35 but on 100 I got fluctuations between high 80s and mid-high 90s.

Being so close to 100c, it's probably throttling to keep temps in check.