the heatsinks they used for air are CoolerMaster heatpipe, double 120mm fanned monsters....

DFI already has a beta bios out for the 790fx-M2R crowd dated 12/1/2009 (i snagged and installed already), i am sure that the M2RS flavor is there too, gots the 45nm microcode, works fine with my 6400+ @3.5/3.6.....can't wait, saw a screenie on a rig with a SB600 @4gig+, so 45nm 4 core goodness for just the price of the cpu and a bios update at first,,,,,,,

ummmmmmmmmmmmmmmmmmmmmm, ummmmmmmmmmmmmmmmmmmmmmmmmm

laterzzzz..............