It seems like
Intel X38 Express chipset has a heatspeader on it and according to motherboard makers, it runs pretty hot when running dual graphics cards in x16/x16 mode.
It runs up to more than 60 degrees in this case. However, motherboard makers will be designing fancy heatpipes for this board so there isn't too much a worry about heat. We will be seeing quite a number of X38 boards at Computex and there will be some designs that supports Intel Turbo Memory.
Izvor:
VR-Zone