Re: Can I CrossFire with this mobo?
Yes this supports crossfire. See the Asus product page... ASUSTeK Computer Inc. - Motherboards- ASUS M4A87TD EVO
If you crossfire two cards the speed on each PCI slot will drop to x8 on that board.
Asus' notes on using these PCI slots:
Originally Posted by ASUS
2 x PCI Express 2.0 x16 slots, support ATI CrossFireX™ technology at x8 link
(PCIe x16_1 blue, PCIe x16_2 black*)
1 x PCI Express x16 slot at max. x4 link(black)
Basically one card in the Blue slot will run at x16. One card in the Black slot will run at x4. Crossfire setup between both will run at x8 on each.
Primary - Gigabyte GA-990-FXA UD7, Phenom x6 1100T, 16gb Corsair Vengance, WD Caviar Black 750gb, CM 850w, XFX 6850 XXX x2 CrossfireX, CM HAF-X
Secondary - Asus P5K, Intel Q6600, 4gb OCZ 800mhz, Samsung 500gb, Corsair 600w CX600, Nvidia 8800gts, X-Clio A1
NAS: Seagate BlackAmor 400 2x 1.5tb Barracuda RAID1