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How do I know if the voltage has been changed?

Hey guys,

I just saw an AD on craigslist for an GTX 590, seems to be in good condition and everything.

But I read in another website that if you change the voltage of the card, you void the warranty.
How can I check (before buying) if the voltage on the card has been changed before?

And also, what are good stress tests for the card? Nothing overnight please, just a 10~15 min thing that I can check if it's working 100% as it should!

Thank you!!
2 answers Last reply Best Answer
More about voltage changed
  1. Best answer
    With this you can test the gpu. download, instal and run.
    With this you can see voltage, temperature and almost everything about your video card
  2. Best answer selected by tutstuts.
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