CPU Fan speed

Blunt · June 13, 2006, 11:59:39 AM

I'm running AMD Athlon 64, 2200 MHz on a K8N mobo

There doesn't appear to be any problems with the Temp atm (ave 41c) but the system monitoring prog Core Center keeps popping up, and I notice the cpu fan speed is about 1450rpm and is gently flashing.

Looks like my fan is dying

...so what's a good replacement?

Ta

suicidal_monkey · June 13, 2006, 12:27:46 PM

what sort of fan is it? Get something the same size and rating and make sure it's quiet

sheepy · June 13, 2006, 01:00:40 PM

or if its a small fan then get an adaptor and put a bigger fan on it!

Anonymous · June 13, 2006, 01:05:04 PM

QuoteOriginally posted by Blunt@Jun 13 2006, 10:59 AM
I'm running AMD Athlon 64, 2200 MHz on a K8N mobo

There doesn't appear to be any problems with the Temp atm (ave 41c) but the system monitoring prog Core Center keeps popping up, and I notice the cpu fan speed is about 1450rpm and is gently flashing.

Looks like my fan is dying ...so what's a good replacement?

Ta
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Depending on the fan/cooler installed 1450 may or may not be a problem. It is probably flashing because most programs treat 1500 as the minimum acceptable RPM for a CPU fan. However, many fans (Zalman, arctic cooling etc) run slower than 1500 but provide great cooling (using the slow and large principle). My BIOS warns me every time I start the PC that the CPU fan speed is low by highlighting it in red. However, it's not a problem because it's meant to be that slow.

So, your 1450 RPM may be fine and the fact that the temperature is stable (about 41) would tend to confirm that. What temp does CPU get up to when folding is running?

suicidal_monkey · June 13, 2006, 01:10:12 PM

what BB said...

Blunt · June 13, 2006, 01:31:14 PM

Cheers for the replies
I think BB might be right...the temp is fairly constant etc so I'm going to keep a close eye on it for a few days

Thanks fellas

GhostMjr · June 13, 2006, 07:46:12 PM

Unforunately i need to post a reply that asks a question but as i haven't got a clue about cpu fan speeds or just fans in general. I wanted to ask a few brief questions if i may. I have a utility in my bios settings called smart fan. Essentially my cpu fans i think run at full speed at the moment and are noisy but i wanted them to run at a slower speed when they are not being laboured to save noise as a short term sloution. To do this the smart fan utility in the bios alters the target temperatures of the system between min 20 max 50 and each of the cpu's being min 30 and max 60 for each cpu. I wondered in the long term what i should do regarding fans for my case and for my cpu's as i wanted to if i can get some less noisy ones for my cpu's and for my case. I have a chieftec dragon dx-01 case i think with two small mounts at the rear, which hold two cheap fans of the case and there are also two others. The first which is built on the side of the case and the second mounted in a small clip at the bottom front for air in. The two at the rear of the case take air out. So in conclusion i do remember TL and Fatbob telling me to get a bigger fan to cut noise, which i very much appreciated but i haven't a clue where to start or what to get for brackets etc. Also i wanted to know what fans i can get for my cpu's to cut noise down.

Thanks again.

suicidal_monkey · June 13, 2006, 07:57:43 PM

and breathe.

...you can replace existing fans that are of a standard size and have regular connectors with quiet versions by looking for the lower dBA ratings (if they don't give one assume they're noisier than they say they are)

...you can have manual fan speed dials and/or automatic controllers like I believe you mean you have on your motherboard. Manual dials are usually variable resistors, the better ones control a transistor or similar, the worse (read:less efficient) ones just adding resistance.

...specifically for the cpu(s) you can sometimes replace just the fan on the HSF, sometimes you need a whole new HSF. Again look for lower dBA ratings (around 20 is usually good/quiet I think)

...you want as few fans as possible running at as low a speed as possibly while shifting enough air to keep things cool. if your case has mounts for 120mm fans use 120mm fans. Can't help you with adapters - you might need to modify your case to fit a 120mm effectively.

edit: if your motherboard lets you change the temperature at which the fans turn up then you can try adjusting this, however your cpu will therefore be allowed to run hotter than before. Whether you're happy about this is another question

delanvital · June 13, 2006, 09:12:25 PM

QuoteOriginally posted by Blunt@Jun 13 2006, 02:31 PM
Cheers for the replies
I think BB might be right...the temp is fairly constant etc so I'm going to keep a close eye on it for a few days
Thanks fellas
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Might take a look at it and check for dust just to be sure.