Does RPM Matter?

E

ezefosure

New Member
I have the zalman in my sig and it has a fan controller. the Min RPM is around 1360 while the max is 2500. i have pc wizard open always, monitering the temps (is that reliable?) and no matter what RPM i set it to, the temps are usually the same. I guess the heatsink SHOULD matter a lot, but why can't i make my cpu faster by increasing the rpm??
(the initial 200 hrs of thermal paste application isnt over yet)
 
ezefosure said:
why can't i make my cpu faster by increasing the rpm??
Click to expand...

You don't really mean that do you? If you did, then that is the most stupid statement ever. Your CPU speed has got NOTHING to do with the RPM. Obviously logically if the higher your RPM the more air the fan moves, but that is only true for fans that are the same diameter. The second you change the diameter, then that changes everything. The most ideal situation is to have a large fan so there are low RPMs which means that the fan will be very quiet. RPM=noise, the more RPM you have the more noisier your fan is.
 
Just to add more to the statement of rpm = noise = high CFM... The Delta HF focused 120mm fans deliver 150+CFM at 4000rpm but at a noise level of 60dB!
 
oops. i meant to say "why can't i make my cpu cooler by increasing the rpm" it was late last night and i was ready to go to sleep before i thought i of just coming on so i could have a response by the time i woke up. lol

and i realise increasing the rpm increases the noise.. i mean i can hear it when it happens. but i just thought thast there would at least be an advantage to that by having a cooler cpu in exchance, but nothing happens. it doesnt even lower a single degree.
 
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it really depends on what the CPU is doing, I don't think there would be a difference when its idle, bit you might be able to see some difference if its under load. However, theoretically increasing the RPM will make your CPU cooler, but the thing is there are alot of factors that might skew that.
 
Could have something to do with your case ventilation, if your case fans are not moving hot air out and cool air in turning up your cpu fan is just blowing more hot air on your heatsink, wont cool to well even with more RPMs
 
well, nevermind. today is a lot hotter than it has been for the last week. and actually now it seems as if increasing the rpm does help. however, at min the c2d is at about 41 while at max (twice as fast of an rpm) its at 37. earlier this week my cpu was at abvout 33 idle, even at min rpm. i dont know why but i just thought that increasing the rpm would have larger effect on the temps. maybe thaht's just my newb talking... lol
 
Glad to hear it. If all other factors are kept constant, then varying the RPM WILL vary the temperature of your CPU.
 
Like it was said before, at idle it's only going to make it a little cooler. But while under load, assuming the hot air is being moved out by the case fans, higher air flow should make a bigger difference.
 
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