I have some seriously weird behavior from my P5Q-Dlx, and need some advice.

After a lot of trial and error I finally got it to post with my E8400. With default settings loaded, cpu-z reported the system to be running 6*333. Trying to set the multiplier manually fails, it always reports 6*. Only way I could get 3 ghz, was by running 6*500, wich seemed stable in OCCT and 3D Mark 06.

My setup consists of the following:

P5Q-Dlx, bios 0704
E8400
2x1 gb G.SKILL F2-6400PHU2-2GBHZ
Asus 7900 GT
OCZ 600W StealthXStream

Questions:
1. I never get any BEEP codes on the power-on self test. This is not correct?
2. Any idea whats up with the cpu multiplier?