I'm building a new PC and it won't post with the second GPU installed. Boots perfectly fine with one card. Figured it might be a power problem but I have a 1200 watt power supply. Here's my setup:
(2) GIGABYTE GV-R929XD5-4GD-B Radeon R9 290X 4GB 512-bit GDDR5 PCI Express 3.0 HDCP Ready Video Card
(2) Crucial Ballistix Sport 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model BLS2KIT8G3D1339DS1S00
ASRock 990FX Extreme4 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
Cooler Master Silent Pro Gold - 1200W Power Supply with 80 PLUS Gold Certification and Semi-Modular Cables
AMD FX-6300 Vishera 3.5GHz (4.1GHz Turbo) Socket AM3+ 95W Six-Core Desktop Processor FD6300WMHKBOX
(2) GIGABYTE GV-R929XD5-4GD-B Radeon R9 290X 4GB 512-bit GDDR5 PCI Express 3.0 HDCP Ready Video Card
(2) Crucial Ballistix Sport 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model BLS2KIT8G3D1339DS1S00
ASRock 990FX Extreme4 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
Cooler Master Silent Pro Gold - 1200W Power Supply with 80 PLUS Gold Certification and Semi-Modular Cables
AMD FX-6300 Vishera 3.5GHz (4.1GHz Turbo) Socket AM3+ 95W Six-Core Desktop Processor FD6300WMHKBOX
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