These original Intel P3 HSF, not the imitation stuff available in the market…
Compatibility :
GF4 and FX series (dunno about the 6 series…
ATI 9XXX series (fits onto my 9600Pro)
the main criteria is, the distance between the mounting holes should be exactly 6cms
Thata an XFX FX5200 the HSF is mounted on. It also has RAMSinks, which i can give away too…
I used to get 300/400 clocks on the stock HSF, but would crash within 2 minutes due to the card overheating. Stock clocks are 250/333
Since i got the P3 HSF, i’ve been doing 325/460 
since a month!!! pakka stable, even after playing UG2 for 1-1.5 hours, the HSF would not get even close to warm!! 
Be warned…this thing takes up 2 PCI slots…
Price : 250 each, shipping extra.