Hi. So, I built a system a little over a year ago for my brother, based on advice from this forum. Thanks for all the assistance, btw. And it worked perfectly up until now.
Crossfired 5770's on a GA-P55-UD4P, and 2 days ago, the video cards just stopped putting out any display. Computer POSTs, seems to be doing fine, just no display. So, he tried taking the video cards out, and then put each video card in each of the PCIE slots, and each card worked individually in either slot. Then, he tried putting them both back in, and the cards didn't work, and spun up to full speed and stayed there. No display. And now neither card will work, they just spin up to full and do nothing. Likewise with the 9800GTX from my old computer.
He took it down to Bestbuy, they tried a different power supply, tried the cards in a different machine (they worked) tried resetting the BIOS, etc. Nothing's working. So, is the Motherboard burned out, and is there anything else that can be tried to get it to work? It's obviously out of Neweggs return period.
Here's the setup:
1 x Antec Nine Hundred Black Steel ATX Mid Tower Computer Case
1 x GIGABYTE GA-P55-UD4P LGA 1156 Intel P55 ATX Intel Motherboard
2 x SAPPHIRE 100283L Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card
1 x CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply
1 x Intel Core i7-860 Lynnfield 2.8GHz LGA 1156 95W Quad-Core Processor BX80605I7860
2 x CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMX4GX3M2A1600C9
1 x Seagate Barracuda 7200.12 ST3500418AS 500GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
1 x LG DVD Burner Black SATA Model GH22NS50 - OEM