Iam having xfx geforce nvidia gt220 1gb ddr2 .i used evga precision to overclock?

i cannot change the fan speed as it is not enabled and in the graph display i cannot see the fan speed ..even i searched in options i cannot see the fan speed display help pls|||This simply means that XFX does not allow you to set fan speed for this particular GPU. Tweak with the other options, fan speed should increase/decrease automatically.