New Build Help

Ok I was running on an old ibuypower laptop and that died not that long ago so i ordered a new one which was pretty much a copy of the $1000 system builder build. I start it up and it doesnt post or display anything

ASUS VW246H Glossy Black 24" 2ms(GTG) HDMI Widescreen LCD Monitor

XCLIO Nighthawk Black Finish 0.6mm SECC ATX Mid Tower Computer Case

HIS CrossFire Bridge Interconnect Cable Model HCFBC4065

Western Digital Caviar Black WD7502AAEX 750GB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive

MSI P67A-G43 (B3) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard

2 x GIGABYTE Ultra Durable VGA Series GV-R685OC-1GD Radeon HD 6850 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity

CORSAIR Enthusiast Series CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply

Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor BX80623I52500K

G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBRL

LG CD/DVD Burner Black SATA Model GH22NS70 OEM - OEM

I've tested it every which way. It powers up everything turns but it doesnt post or display anything
CPU gets hot
All my fans start
All my lights turn on
Harddrive starts
CD Rom works
Graphics cards start
tested my ram

And when i couldn't figure it out i had my brother look at it he majored in computer science and he couldn't figure it out
Any help would be most appreciated .

double check ur GPU

well run each one separately, see what u get