mine can, is your damn fast 6800 Ultra. It eats large volume texture data in very short time. it overloaded the V-MAP speed limit. your system hang. Now what we need to do is not modding the Vdimm which is highly dangerous to MB, but just easliy and safely attach a heatsink to SB. but one thing I need your help, you have any idea what kind of sticker of geil we need to use for the heatsink? It must be a good heat-conductor.