2nd GPU will not display anywhere

[sassal]

Hey all,

I recently purchased a new system and built it myself. Everything works perfectly fine except for 1 main thing: My 2nd GPU will not show ANYWHERE.

Gfx cards: 2 x Sapphire Radeon 6950
Motherboard: Asus Maximus IV GENE-Z

Now, I know that it is working because the fans are spinning on the GPU, i have the crossfire cable firmly connected and same with the molex cables.

The second GPU will not show in the BIOS, will not show in the GPU-Z utility and the crossfire option is no where to be seen in CCC. I have CCC 11.8 btw.

Would anyone be able to tell me whats wrong? It would be MUCH appreciated

oh and for some reason the fans are very loud on my GPU but i suspect that its because my top GPU is so close to my bottom GPU?

Thanks in advance

 

[Twoboxer]

Set your PC up to run with a single vid card, no crossfire. Does it run OK?

Now replace vid card #1 with vid card #2. Does it work ok?

Repeat the above two steps using a different PCIe slot. Does each card work by itself when in that second slot?

What make/model of PSU are you using?

 

[sassal]

Yes, they both work fine, i found out what the problem was. The second card wasnt getting adequate power which was wierd because the cable i had it on was also running other things. Its got a P4 connector on the end of the power supply cable i connected the 2nd card too, where does that P4 connector go? :\

oh and im running the first graphics card off an extra cable that i added to the power supplys 6 pin connector.

Im using Antec Continuous Power 850W

 

[Twoboxer]

Once we proved the 2 cards worked alone, the next steps to check were power and crossfire connection.

Glad you solved the problem.