Increasing Fan RPM

justiceforall · Sep 15, 2013

Hi everyone, this is my first thread. I've been surfing in this forum for a long time and today i decided to sign up.
Firstly, i read most of threads about this problem and could not find any solution. I bought Xigmatek Apache EP-CD903 yesterday. I did everything correctly about installing it and it is working well. But in the specs of this cooler, it said "2500 RPM +- %10". I think, it means that this cooler is rated 2250 to 2750 RPM. But mines running 2400 at max. Speedfan or BIOS could not make it run above 2400 RPM. And i really want to know something, if i buy a new exactly same cooler, it may run at 2750 ? I mean is this +-%10 thing all about chance ? Thank you.

13thmonkey · Sep 15, 2013

yes that's the max speed, you are a little low but that's all. Is it connected to a 4 pin PWM fan output? Is that being told to be at 100%, which is a software issue. Check your bios, or software that came with your mobo.

justiceforall · Sep 15, 2013

13thmonkey :

My motherboard is an old one. It is connected to a 3 pin, and there is a writing above these pins: "CPU Fan". And in BIOS, there isnt any Fan Control setting but Cool n Quiet and Q-Fan. I ve played with those settings, and never runned above 2400.

13thmonkey · Sep 15, 2013

Q fan will allow you to set speed (its done by a different way on a 3 pin). cool n quiet will only slow the cpu down when idle. what settings do you have for qfan?

justiceforall · Sep 15, 2013

Making Q-Fan enable just allow me to change Target Temperature. Nothing beside that. This is not my SS but BIOS is the same as mines : http://img.hexus.net/v2/motherboards/amd/nforce4sliroundup1/images/a8n/bios_hardware_big.jpg

13thmonkey · Sep 15, 2013

so decrease the target temp so that it forces fan to 100%, if it is still at 2400 then that's that. it's a shame that these kind of coolers don't use a separate 120mm fan, in which case you could just change the fan.

justiceforall · Sep 15, 2013

Do i have to keep enabled Q-Fan after decreasing the target temp ? And It's now on 72 C, which target temp would you suggest ? By the way, CPU temp is 62 on load.

13thmonkey · Sep 15, 2013

well if target is 72 and it is at 62, then why would it run at 100%, try target of 50, it'll force it to 100% once above 50c then fine tune the value for noise once you are happy it can go above 2400.

Calculatron · Sep 15, 2013

justiceforall :

Short answer: Yes.

Not every fan can be constructed 100% identical and the same during production, and these small variations in fan speed are, sadly, a byproduct. 100 RPM is nothing to sweat over, and 2750 RPM isn't going to make a world of difference either, except for maybe in sound, so I wouldn't fret. (Although, having that extra perceived headroom always seems nice, doesn't it?)

13thmonkey · Sep 15, 2013

Calculatron :

Agree completely, the cooling impact would be minimal the noise impact reasonable.

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