92mm PWM Fan for 4870 advice

[atomos]

Hi all,
Does anyone have any experience of using PWM fans on the the Ati 4870 and could they make any recommendations for a good PWM? This is to mount to a HR03, I had previously tried a Nexus Real Silent PWM fan but it produced a whining noise.

Thanks.

[Pob255]

Graphics cards don't use PWM fans, they use 2pin basic DC and vary the voltage for change the speed dependent on the heat of the gpu within the cards bios
It might of been the simple case that the card was just not supplying enough amps to the fan (larger fans require more amps)
You should be able to plu the fan into the motherboard but then the card/drivers/card bios will have no control over it.

[colmo]

I've been trying something similar. In the end, I concluded PWM isn't the answer - I'm happy with the fixed-rpm Evercool EC8025M12S I ended up using.

What you could do is use a fan with it's own thermal sensor. A quick check on eBay reveals Akasa make a number of them in different sizes.

[LuckyNV]

Graphics cards don't use PWM fans, they use 2pin basic DC and vary the voltage for change the speed dependent on the heat of the gpu within the cards bios
It might of been the simple case that the card was just not supplying enough amps to the fan (larger fans require more amps)
You should be able to plu the fan into the motherboard but then the card/drivers/card bios will have no control over it.

Many do actually, HD4870/HD4850 reference coolers use PWM fans, as do stock 8800GT and quite sure GTX260/280 cards, plus many more

[Clunk]

This should be what you are looking for.

[vincent.m]

when installing aftermarket heat sinks, what happened if you forget to put one on the small parts? you know the little ones that you just stick on..

[atomos]

If you forget to put the heat sinks on the RAM depending on the clock of the RAM it will most likely make the card unstable. Back to my original question, the problem is with using PWM fans they are susceptible to producing acoustic noise, I wondered if there are any PWM fans out there that anyone has had first hand experience with which doesn't.