BIOS settings sometimes get scrambled during a flash. Try the following steps:

1st, go into the BIOS and load optimized defaults. Since this is a performance BIOS, it will set your RAM timings very aggressively, so before you save and reboot, go into the Cell menu and set RAM timings manually to their stock values. Then save and reboot and see if your processor is running at it's default x9 multiplier, as verified by cpu-z, everest, or another cpu-id harware monitor. If it is, then reapply your overclock and see what happens.

If that does not work, I would reset the CMOS and try from there. This should better ensure that any lingering issues from the flash are rectified, as the CMOS is reset to factory values (but using the flashed BIOS version.)

When upgrading BIOSes, it's always helpful to first reset your settings back to factory-spec before flashing to a newer version. Some people feel a CMOS reset before and after the Flash is the best way to ensure that no problems occur, but in the last ten years I've never felt the need to go that far.