Is anyone undervolting their CPU HSF with good results?

[glen]

I have one of these, VANTEC AeroFlow VA4-C7040, and it is a beautiful unit:
here
But, I think it could be just a bit quieter.
Is anyone undervolting their CPU fan and still having it cool enough?
This is on an AMD Barton chip.
Next step is to replace the PSU fan, then i think it will be queit enough.

 

[pelikan]

I'm a quiet freak too. If you have good case cooling you could probably turn down the fan. I use a panaflo L1A (21dB) on my slk-800. I also switched my PSU fan. There's pics of what I did in my sig.

 

[BG4533]

What are your current CPU temps? They will decide whether you can undervoly your CPU fan. I am running a 39CFM fan at 5V on my HS. I cant hear it from more than 6".

Brian

 

[RalfHutter]

My P4 2.66 @ 3.00Ghz rig is running an Alpha 8942 with a 7V Panaflo M1A on it. Idel temp runs 33°C, Prime95 load temp runs 45°C.

My PIII-S 1.4Ghz rig is running a Thermalright SLK-800 with a 7V Panaflo M1A on it. Idles around 35°C, Prime95 load temp is 39°C.

 

[chocoruacal]

Originally posted by: glen
I have one of these, VANTEC AeroFlow VA4-C7040, and it is a beautiful unit:
here
But, I think it could be just a bit quieter.
Is anyone undervolting their CPU fan and still having it cool enough?
This is on an AMD Barton chip.
Next step is to replace the PSU fan, then i think it will be queit enough.

Uh...why not shell out the whopping $8 and get a YS tech adjustable? They are nice, and it saves you the trouble of buying 3/4/5 different fans before you find the one that "sounds" right

That said, my XP2400@2.1ghz does 35-40* with a 18cfm NMB and 40-45* with a 30cfm SVC brand, using a TRight AX7. The NMB is sooooo quiet. But I put a YS Tech adjustable on my bro's XP2500, and its the only way to go...goes from 10cfm to 40 I believe. I don't have it hooked up to monitor RPMs, but using a SLK800u, cranking it down to near silence still keeps his CPU at 40-45*.

 

[pelikan]

You could 7V it or use a variable resistor too.

 

[klein297]

I like using the Zalman resistor that comes with their flower heatsinks.
Am using it on a PAL 6035 to cool a XP1700+, have used them on everything from a GC68
to the stock AMD heatsink .
They do a nice job of quieting things down.

 

[0roo0roo]

my 2000+ palomino somehow survives with a hcc-002 coolermaster heatsink and a vantec 12cfm fan. it came with a 6800rpm monsterous fan but i couldn't stand it. chips not worth squat anyways, if it dies eventually who cares its stable now and temps aren't bad at all.

 

[0roo0roo]

you can get a fanmate 1 speed controller for about 5 bux from many places too.

psu, if ur gonna mess with that i suggest you get a fanbus/rheobus. i have a nxp-201. i hooked it up to my psu. some cutting and crimping required cuz well, psu fans arent meant to be replaced or messed with heh pretty easy anyhow, its just two color coded wires. you can then use the knob to control the fan until its just barely audible svc.com has the controller for 21 bux. 4 knobs, each channel can handle 15-18 watts of fans, quite a few normal fans. if your going to undervolt your cpu fan, control your case fans too. if you don't have any, install one or two.