Asrock z68, 5750 & 5770 crossfire problem

I am trying to upgrade my system because I received a radeon 5770 to crossfire. The system is:

asRock z68 extreme3 gen-3 mobo,
Corsair tx650 psu,
HIS Radeon hd 5750,
MSI Radeon hd 5770.

The problem I have is if I plug one card in, the system boots fine. I have tried it with both cards, the 5750, and the 5770 in two different pci xpress slots.

However, when I connect both cards, with power to both cards and the crossfire bridge, the system will not boot. It goes directly to the BIOS.

Dr. Debug is giving me error code 0xA6, which says SCSI detected.

Anyone have this issue and know how to fix it? I have not played with BIOS settings, but I have looked through the BIOS and did not find any relevant settings.

Thanks,
13 answers Last reply
More about asrock 5750 5770 crossfire problem
  1. You can't crossfire a 5750 with a 5770 - They are both different cards.
  2. are you sure? According to this: http://en.wikipedia.org/wiki/ATI_CrossFire I can as long as they are in the same hundred series, so 57XX would run together...

    Anyone else have an idea?
  3. The 5750 and 5770 should be able to be run in crossfire but you will effectively have two 5750's.
  4. Mousemonkey said:
    The 5750 and 5770 should be able to be run in crossfire but you will effectively have two 5750's.


    Thanks, that is what I thought, anyone have any insight on what might be causing the issue with it not booting?
  5. Are you using the bridge that came with the motherboard?
  6. Mousemonkey said:
    Are you using the bridge that came with the motherboard?


    The bridge that came with the motherboard is an SLI bridge. I am using the bridge that came with my 5750 card which is the crossfire bridge.
  7. deadjon said:
    You can't crossfire a 5750 with a 5770 - They are both different cards.


    That is not correct. I had the same exact setup, a 5770/5750 for about a year until I recently upgraded to two 6870's. If his motherboard supports crossfire, then a 5770/5750 should work.
  8. icepick64 said:
    The bridge that came with the motherboard is an SLI bridge. I am using the bridge that came with my 5750 card which is the crossfire bridge.

    Just checking, I've seen people try to use that bridge for ATi cards before so I thought I'd better ask.
  9. Mousemonkey said:
    Just checking, I've seen people try to use that bridge for ATi cards before so I thought I'd better ask.


    haha, yeah I could see that easily being a common issue.
  10. Have you turned off the Lucid Virtu bits?
  11. Mousemonkey said:
    Have you turned off the Lucid Virtu bits?


    Ah, no, that is a very good idea. I will try that, thanks!
  12. Eh? is this specific to the 5 Series, I know you cant Xfire a 6950 with a 6970 due to fact that the model code is embedded in the firmware - well thats what Ive read
  13. deadjon said:
    Eh? is this specific to the 5 Series, I know you cant Xfire a 6950 with a 6970 due to fact that the model code is embedded in the firmware - well thats what Ive read


    You can CF a 6950 and a 6970. Not sure hwy anyone would want to though. http://www.sevenforums.com/hardware-devices/185770-here-amd-compatability-crossfire-chart.html
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