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5770 Crossfire Disabled Adapter problem


New Member
May 21, 2011
2 (0.00/day)
Hello, I am having a problem enabling Crossfire with two Sapphire 5770 cards.

In CCC one of them always shows as "Primary Adapter" and the other as "Disabled Adapter". There is no option for Crossfire.

I have tried:
-Flashing the BIOS of the older card. One is a second generation Sapphire HD 5770, the other is the newest (third). I just purchased the newer one.

-The latest revisions of the 10.x and 11.x drivers

-Switching the cards' PCI slots

-Plugging my monitors into either card.

My system is:
Core i5 2500k
p8p67 rev 3.0
Fresh Windows 7 install

Thank you for your help
May 9, 2011
1,877 (0.78/day)
Mainland Britain
System Name H2o Box
Processor Intel(R) Core(TM) i7 4820k @ 4.40 GHz
Motherboard MSI X79A-G43 Plus (MS-7760) v3
Cooling CPU EK Block and 360RAD H2o
Memory Gskill RipjawsZ 16Gb 9-10-9-28 3T @ 2021Mhz
Video Card(s) Zotac GTX 1080ti AMP EXTREME, EVGA GTX 980ti FTW
Storage HyperX Fury 120GB & Savage 480GB SSD, Seagate 250GB,250GB 7200rpm Kingston 64GB SSD
Display(s) Panasonic GT30 46'' 1080p 3D HDTV [Custom Resolution 3200*1800]
Case Corsair O-800D
Audio Device(s) Creative Sound Blaster X-Fi Titanium Fatal1ty Pro
Power Supply Be Quiet! [Dark Power Pro 11] 1200W CM replaced [7-4-2017]
Mouse Asus ROG
Keyboard Microsoft Digital Media 1.0A
Software Win 10 Pro 64Bit v 1703 / OS[build 15063.13]
Hi @ 2DividedbyZero

The P8P67 is not intended for full support of crossfire, x4 on PCIE should not notice unless running a 6990 that would require x16 on the PCIE

Slot support for P8P67
1 x PCIe 2.0 x16 (single at x16)
1 x PCIe 2.0 x16 * (max. at x4 mode [Black])
3 x PCI
*The PCIEX16_2 slot shares bandwidth with the PCIEX1_1 slot, PCIEX1_2 slot and USB3_34 connector. The PCIEX16_2 runs at x1 mode by default for system resource optimization.


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