P5K Deluxe.. overclocking issue

Alright im using a P5K deluxe board to overclock my Q6600 and E6600. Whenever i push either cpu to high prime95 gets this weird FATAL ERROR: Rounding to 0.4 something. I have never experienced this when overclocking on any other board. I have overclocked both cpu's in a Gigabyte P35-DS3R, Abit Ip-35 pro and this board. Both other boards would simply crash when the overclock was too high. This board causes prime95 to get a fatal error. The reason why im worried is my Q6600 started messing up as i had it oced in that board. At 3.6 ghz prime95 was stable. At 3.8 it got the fatal error issue no matter what voltage i used. As time progressed my computer started to stop booting up when i booted cold. Eventually my computer wouldnt boot up at all. I had already decreased my oc back to 2.4 when it completely hosed up. Now my E6600 is getting the Fatal error although not the cold boot issue. Please respond.. do i have a bad board?

Did you make sure your temps were under control while you were benching? Try clearing the cmos, setting everything to default and boot at stock speed. I would also recomend loosening the ram timings while trouble shooting the cpu and mobo.