HD5770 causing hang-ups

[jimmyzline]

OK. So I recently had a mobo blow-out and replaced it. I went to the MSI 890FXA-GD70. All was fine for a couple of weeks but recently one of my xfired HD5770's is causing the system to hang or not start at all. When I say not start, I mean there is zero HDD activity and no video output at all. If I remove the card from the system all works but obviously xfire goes out the window. I am at a loss. I could figure this out if it simply caused video issues but to render the whole system unusable?

Any advice would be greatly appreciated.

AMD 1055T stock
MSI 890FXA-GD70
Patriot 8gb DDR3 1600
(2) XFX HD5770 in xfire
Ultra LSP750 PSU

 

[jaguarskx]

It is possible the blow out could have damaged the HD 5770. Does your PC turn on when only the supposedly damaged HD 5770 is installed?

 

[jockey]

Have you tried both cards individually in PCIe slot 1 on their own?
Have you triple checked all power connections, reinserted cards into slots?
I don't mean to ask stupid questions, but sometimes these easy solutions get overlooked.
You could also try a single card in PCIe 1 and PCIe 2 slots to verify whether or not it's a mobo issue.