T-Break posted a review on the ASUS P5WD2-E Motherboard

With their 9xx series of CPUs, Intel also introduced the 975X chipset. There’s basically just one big difference between the 975X and Intel’s previous 955X chipset- the possibility of dividing the PCI-E x16 slot into two PCI-E x8 slots and thus supporting dual graphics cards. While SLI is unsupported, Crossfire works just fine on these boards.

ASUS P5WD2-E Motherboard Review