I built a computer in June, with a 5970 card, and it was running great. But all of a sudden all framerates have dropped 50%.
CPU-Z says that the two gpu's are running at different speeds.
Core 1= 725/1000
Core 2= 156/300
I tested it in furmark, and it was running at 180fps instead of the usual 340+ but every once in a while, it jumps to 320, and then falls to 180 again. Temps are rater low.
When i stress the card, the psu makes a rather loud noise too.
I have used 3 different drivers and cleaned with driver sweeper. Didn't work
All overclocks are turned of.
I have turned off all programs and a lot of services to make sure that they are not the issue.
Mayby the psu is not providing enough power?
Or has one of the gpu's died?
Yes sorry, must have had a blank moment, It could be either of them. are they from the same supplier? otherwise try to RMA both of them, they'll probably go through seeing as most suppliers don't/don't adequately check there RMA's, and on the off chance that they do It eliminate which product was defective anyway.
I'd bet the card usually will downclock one chip when running idle, and furmark is a terrible bench to try to figure this out with. Use a different bench, furmark tends to overheat cards and they'll clock down because of it.
For solutions, reinstall drivers and clean out the card's fan. Also, what are your load temps and what're you monitoring them with?