[QUOTE=coolcolors;2566900]This is very bad advice and should never be given unless it came without a fan in the first place…so to the OP don’t follow this advice…or your GPU will be short lived…and the poster will not pay for your warranty repair…even if the warranty is past…[/QUOTE]
Maybe I should have been more specific with my post…
I have a x600 that runs (albeit hot) fanless with a small aluminum heatsink, all factory installed. The card has been running fine for the last few years. Here is a picture of the card I have for reference: http://www.txcesssurplus.com/servlet/the-4519/ATI-Radeon-X600-PCI-dsh-e/Detail
I suggested the heatsink in my previous post for two reasons; First it was only $10usd where as many aftermarket HSFs for GPUs are quite expensive. Secondly, the heatsink is huge compared to the stock heatsink on my x600, and has heatpipes. I therefor assumed if installed correctly that the heatsink would be able to perform well with a low power card like a x550. The fan installation isn’t too simple but if you did install it I think you would find the fan to be almost silent on the low setting. I just turned the fan to low on mine and my overclocked 8800GT runs at 60C while running Folding@home.
One warning, if you do purchase this HSF and plan on installing the fan, know that it takes up an additional PCI slot space below the GPU.