bought a gtx 260 216core 55nm SSC off ebay pretty cheap,
pretty happy with it atm,
just when i try overclock to slightly
it will switch down to 400mhz and stay there until i shutdown,
and when i try adjust the 400 to 675mhz(default)
it wont allow me,
also getting a squeal on the card but judging by looking around this is very common
anyone know why it downclocks automatically? driver issue?


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