Which replacement fan for PSU ?

UKAndy B · 17 Oct 2009 at 23:32

Hi,
After having had a new comp built by my insurance (lightning strike to next doors house, so fried loads of things in ours!), I would like to improve on it.
I have replaced the stock Phenom 955 cooler for a Arctic Cooling extreme one, chainged the chipset cooler for a Thermalright one, fitted a Zalman passive cooler to the graphics card (with a low noise fan)
The main noise from the machine now is coming from the PSU, which is a OCZ 700SXS, and has a 120mm fan.
I would like to make it a bit quiter. I cannot exchange the unit, as it was built for me by a THIRD party !!! (ie insurance subied it out, and they then did the same !).
After giving my life story.....
What is a good replacement 120mm fan for going in a PSU (I'm a 'spark', so am aware of the risks of capacitors etc inside)?
Would like it as quiet as can be
Goes into a CoolerMaster HAF case (a superb case if you ask me!!)
It is a 700W PSU. One graphics card, 2 HDD, one optical drive. It is mounted at the bottom of the case, and draws air (and crap) from under the case, and straight out the PSU.

Sorry to have waffled !
Andy

Monkeynut · 17 Oct 2009 at 23:52

To be honest, I wouldn't replace the fan with a slower one. It might run cooler not taking air through from the components but I'd just get another PSU and flog the one you have.

UKAndy B · 18 Oct 2009 at 00:02

It draws the air from under the case, ie 'fresh air', so is only at ambient temp. For what I would get on a auction site, and how much I would have to pay for a 'silent' PSU, I would sooner try changing the fan (not bothered about warranty, as it would be too difficult to clain on it).

Monkeynut · 18 Oct 2009 at 00:08

Well first you need to know the model of the fan in it, how quickly it spins, etc, and then get a fan of the same speed but one of better quality. A lot of PSUs seem to use cheap fans in them.

UKAndy B · 19 Oct 2009 at 00:51

Done a bit of googling, and found a strip down review of the psu. Here is a bit about the fan :-

'For cooling the PSU, OCZ adds just one 120mm black fan which is branded as Yate Loon Electronic, model number D12SH-12. This fan is 12v rated and capable of spinning at 2200 RPM speed with 88 CFM under 40 dB- kinda noisy.'

Also found that people have had problems with fan speed stuck at 100% (suposed to have a fan speed changing 'function'.)
I may see if i can get the fan to change speed (hairdrier blowing hot air into the inlet), and see if it speeds up.

hyperst · 19 Oct 2009 at 01:06

have a look at enermax everest twister 120mm, very quiet, upto 1000rpm and have a temp sensor built in to control the speed

Ducky Spud · 19 Oct 2009 at 01:10

Yate Loons are very good fans, lots of people swear by them but yea, at 100% they can get noisy! See if you can alter the fan speed, may have to wire in a resister to slow it down, but it should be a good fan I think

UKAndy B · 19 Oct 2009 at 10:05

Does anybody know what size thermister would be fitted to this, or a similiar psu?
I think I shall try and order one from ******s or RS components before I take it apart (taking care of course!!!), just in case it has failed. I dont want to fit resistors etc to the fan, as that would then 'hard limit' the upper speed the fan could run at.

UKAndy B · 20 Oct 2009 at 15:56

Just had a 'peek' through the mesh on the psu, and the fan is NOT as I thought (never trust everything you google!!).
It is a ADDIS AD1212HS-A71GL (120mm fan).
I have ordered a Noctua NF-P12 fan to replace it (this model has a higher static pressure more suited to psu or rads with close fins than the Noctua NF-S12 model.
I will also obviously be checking out the thermister when I open it up (CAREFULLY OF COURSE).