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.
The also have some bits and pieces
for Nvidia cards, although they look nothing like as effective. Maybe they donâ€™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!)
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. Iâ€™ve not done very extended Furmark runs but itâ€™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 donâ€™t know the actual temps, the reported â€œPCBâ€