Cgminer crashing with 2 video cards

[orbcon]

Hi Folks,

Not sure if this is the correct place to post this but recently picked up an MSI R280X gaming card, already had an EAH6950 Direct CuII which was mining on Scrypt at about 450khs, when I put the R280X in the slot that the 6950 had been and moved 6950 down a slot all seemed fine until I ran cgminer...

Runs fine for about 30 seconds then get message of "driver has recovered" or some such, another few minutes later cgminer crashes.

I've a 1000w PSU so don't think that's the issue, have setup the batch file to apply settings to each card so amn't really sure what's causing the issue.

Prior to crash the 6950 only seems to be putting out about 70khs so I'm not sure if it's an issue with the motherboard or something daft that I'm overlooking.

Any help with this would be much appreciated.

Thanks

[InCoinsITrust]

unstable overclock is the issue, try lowering clocks or upping voltage, could be a temperature issue.

[orbcon]

unstable overclock is the issue, try lowering clocks or upping voltage, could be a temperature issue.

Sadly I've still had no joy with this, can get both cards to run in cgminer with basic batch file but once the 6950's intensity is put even to 12 it craps itself after about 30 seconds.

I don't have the 6950 connected to a screen or have dummy connectors attached, is it possible that this would be the cause?

It's extremely irritating as I could be getting another 400+khs from that card if I could just figure out what I'm doing wrong lol.

[InCoinsITrust]

I think, that it is either not efficient power to that6950 card, or there is some temperature issues with that card.

[dmatthewstewart]

Attach a monitor or dummy connector first and run it. What is your hash rate with the intensity at 11 or 12? (Or whatever level you can run without it crashing)

Also, what are your temps?

And when you say that it "craps out" what exactly is happening? Does cgminer crash completely or do you just get error messages?