HD4870 Crossfire Problems

jdogg707

Diamond Member
Jun 24, 2002
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System Specs:

Intel Core 2 Quad - 3.21GHz @ 1.26v
TRUE Black w/Noctura PF-12 Fan
Asus Rampage Formula x48 Motherboard
4GB (2x2GB) DDR2-1000
Azuntech X-Fi Prelude Sound Card
2 x Sapphire HD4870 Video Cards in Crossfire (Arctic Cooling Accelero S1 Rev. 2 attached)
2 x 300GB WD Velociraptor in RAID 0
LG Blu-ray Write/HD-DVD Drive
Corsair 750TX 750W PSU
Lian-Li PC-V1010B Mid-Tower Case (1x140mm, 2x120mm, 1x92mm Fans)

I don't think the Crossfire array is working. I ran 3DMark06 last night and only received 18,886 on default, which seems low for my system. I have Crossfire enabled in the drivers and have the bridge connected. When I try and run 3DMark Vantage, I get some weird chopping and tearing, like the frames are terribly out of sync. GPU-Z recognizes both cards, as well as the ATI drivers (The latest hotfix version), and both of them are running at about 45C idle/60C load. Any ideas?