290x Problems | 2 LTC BOUNTY

[miner765]

So, once again. I want a 4x R9 290x TRI-X setup. I can get it stable with 2 GPU's. Once I get to 3 or more - one GPU keeps going SICK or DEAD. Please help. I do have enough PSU, 2400W.

Same bounty, as no one seemed to help me.

[tygarbyte]

more info, ie is it openair case ?

mobo? spec ? os? etc etc

[DarthMuffin]

Powered risers if you don't have them.  That's too much to run off the MB.

[miner765]

more info, ie is it openair case ?

mobo? spec ? os? etc etc

ASRock H81 BTC
Windows 8.1

Regarding powered risers. People say NOT to use it with this board since it's not required and it may cause damage to the board. The board got 1 additional molex slot by the way. Both are plugged in.

[Mav2000]

PSU? Or are you using two of them? With four of these cards, I would prefer 2 x800W units.

I just tried setting up another one of these rigs and with 4 x tri x 290x's it would just freeze. With two no problems at all. Changed over to two quality PSU's and no problems now.