There are a few VRM products out there that I know of.
Thermalright make a couple of very good VRM coolers for ATI HD4870/4890 cards.
VRM-R1
The also have some
bits and pieces for Nvidia cards, although they look nothing like as effective. Maybe they don’t need to be for some reason.
Zalman also do a couple of items:
Zalman for HD4870 / HD4890
Zalman for HD3850 / HD4850
Or you can roll your own like I did (rather expensively!)
Pic1
Pic2
Enzotech Northbridge heatsink adapted to fit the HIS chip and RAM sinks cut to fit under the Akasa Cooler. The actual VRMs have Enzotech VRM heatsinks, that I think are really intended to be used on a motherboard. I’ve not done very extended Furmark runs but it’s stable running folding@home. At low fan speeds it does all get very hot, the VRMs becoming to hot to touch! There is no VRM temp reported on this GTX260 so I don’t know the actual temps, the reported “PCBâ€