More info would help everyone.

Windows , Linuix , ?
Monitor , no monitor ?
New setup , Old setup, and just started happening,

If Linuix , i know very little, but when i set up a rig i had trouble with clocks being wrong and it turned out to be a bad Driver install.

In cgminer when you try to set it to 925 does Cgminer show you can go that high?