Bitcoin Forum

Hi!

I recently bought a r9 280x card(sapphire) to mine alongside my old  7970 card, but for some reason after a few minutes of mining the gpu crashes.
Its not overheating, my old card never goes above 82 degrees, and the 280x is around 73 degrees constantly.

I´ve tried to synchronize the clocks on the 7970 to match the 280x, disabled the ULPS in the sapphire trixxx utility, even tried using crossfire when mining, nothing helps.
Using the 13.11 Cataclysm version+cgminer 2.11.4 on a win 7 machine.
Couple of days ago i somehow managed to get both cards running at  full speed for a couple of days, then it crashed and haven't succeeded in replicating the results.

I suspect its my old card screwing something up, i could run both of those cards when i lower the intensity from 13 to 11 on the 7970.
I´ve tried both multiple instances of cgminer, and one to operate both cards, didn't make a difference.

Using a 850 watt PSU, and according to the online calculators i used it should be enough to run both of those cards on my system.
I´m all out of ideas, and hope someone can help me out  ???

EDIT:
The 7970 crashes when the temperature hits 82 degrees apparently..and for some reason it is listed as "disabled" in cataclysm

different generations of cards are very hard to get running stable on the same system. your best bet is set the 280x up as display card and either crossfire them or better yet use a dummy plug.

its why you dont see mix and match mining rigs