Clocks changed on thier own!!!!

[zbrains]

ok i just overclocked my GTX 260 oc and well the clocks are at 650 for the core and memory is at 1000. and it just randomly set the clocks to 399 for the core and 297 for the memory. i rly need soem help cuz iem freaking out right now i cant afford annother gpu soooooo yea plz respond fast!!!!

 

[zbrains]

ok well i just used riva tuner to stop it from doing it and its running fine now but i always have to have riva tuner up i think its unconventional but it works and if annyone has anny better ideas plz post