Asus Maximus & GPU Help

[Eaks77]

Hey Everyone,

I have a water cooled mining rig with a i5 and Asus Maximus board. Overkill..but I wanted to try a water cooled machine and I got it for a good price, used. It came with two 6950's and it was running steady for a couple weeks.... But for the search of more hash, I took out the 6950's and put in two watercooled 6990's with one watercooled 6950. I apologize for not having the exact motherboard model, but there are four pcie x16 and one partial pciex4 slots. I'm running windows 7 and I installed ATI 13.12. It's only recognizing the first 6990. So before a fresh windows install and trying different drivers, I thought I'd give BAMT a try.... Same problem... It's gotta be a motherboard problem... Right? What am I missing? I tried connecting the crossfire between both 6990's and no change in result.

Help!

Thanks

 

[ATMINSIDE]

Do both 6990s work independently from each other?

 

[Eaks77]

What do you mean?

Out of the cards I have in there, I know 100% that the 6950 and one of the 6990's work. This is the downside of Watercooling and a gamble that I took. I bought the other 6990 on ebay and It was allegedly in working order. But even still... the 6950 isn't recognized.

Hopefully this answers your question

 

[ATMINSIDE]

I'm asking if both 6990s are working properly since one isn't being seen.

Plug them in separately and see if both run normally.

 

[MongGrel]

Yeah I'd make sure they both work first, then it's sometimes a conflict in you're PCI lanes occasionally when some MOBO's switch lanes depending on what else you may have plugged in.

I had two GTX 260s in SLI once that had worked for years and wasn't till a rebuild found out one was non functional.

Sounds odd I guess, but make sure both cards work first off.

 

[Eaks77]

Problem solved.... and it was super simple (as I presumed) ... thanks for everyone's help

 

[sobe]

For reference in case someone else comes across this thread, please post your fix

 

[Eaks77]

I was not familiar with the mother board and never seen this before... but the Asus Maximus has physical switches to turn each PCI-e slot on or off... simple!

 

[ATMINSIDE]

I was not familiar with the mother board and never seen this before... but the Asus Maximus has physical switches to turn each PCI-e slot on or off... simple!

That's common on boards meant for extreme benchmarking, which the Maximus is.