Asus P5E3 Premium/WiFI-AP@n
-Intel Core 2 Extreme QX9770 3.2GHz 12MB Cache 1600MHz FSB
-600GB (2 x 300GB) WD Velociraptor SATA 3.0Gb/s 10,000RPM 2 x 16MB Cache
-2 ATI Radeon HD 4870 X2 graphics gards
-Corsair XMS3 DHX TWIN3X4096-1600C7DHX 4GB DDR3 2X2GB DDR3-1600 CL 7-7-7-20 dual channel memory kit
-Thermaltake 1200W PSU
This is a new build. I'm trying to get my 2 Radeon HD 4870 X2's to work in CrossFire. Problem is When I have the two cards plugged into my motherboard I get nothing! No display at all just a blinking monitor . Each card works fine on their own in whatever slot I stick them in. Why am I getting nothing when they're both in? What can I do to fix this. The CrossFire cable is connected and all the power connections are made.