7970 Lightnig

Hey .
i run a MSI Z77 Mpower / 700W gold / i5 -3570 k on 4,5Ghz

so i just buy a 7970 Lightning and i have Crash when i testing in MSI Kombustor .
i try everything changing AMD drivers chceking the PCI slot and the 8 pin cables :(

i dont know what to do pls help
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More about 7970 lightnig
  1. tell us more about the crash
  2. i also have this error after playing BF3
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