GPU downclock???!

Hi, I'm currently having an issue with my GTX480 SLi. The gpu clock, for some odd reasons, downclocks and that is during gaming. When idling it goes to 50mhz which is comprehensible since im not giving any load to the gpus... however I don't understand why they downclock from 700mhz to 202mhz while playing ... Also, one card has a voltage of 1050mv and the other card has 1038mv: why is there a difference?

here are my specs if needed :

- AMD Phenom II x4 965 BE oc'd @ 4GHz (stable)
- MSI NF750-G55
- 8GB DDR3 1333MHz G-Skill ram
- 1000W cooler master silent pro PSU

and the game im playing it on is Mirror's Edge. Note that it happened on other games such as Batman Arkham City etc...

Thanks for your time!
5 answers Last reply
More about downclock
  1. Does that happen with one card too? Might be power issue.
  2. no, it doesn't. isn't my psu enough... 960w on the 12v and single 80amps 12v rail
  3. Your PSU should be fine. cooler matter makes some junk ones but the silent pros aren't bad
  4. do you think the psu is the problem? would you have opted for another one?
  5. I don't really know. Try running Prime95 along with Furmark with crossfire enabled and check if it downclocks.
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