I have a strange bug with my EVGA 58X SLI motherboard and Intel i7 920 CPU where if I OC the CPU my computer timer changes. Game animations, music, and dialogue all speed up super quickly. This makes games impossible to play and puts me at a risk for speed hacking in online games.
(The OC is recognised on startup before Windows boots, but after the Windows boot CPU-Z and computer properties don't seem to recognise the change.)
My OC was an attempt to bring it to 3.6 ghz from its stock 2.67ghz