I5 750 16x multiplier

Try flashing BIOS.
Did the trick for me

Good luck

Flash to which version? Currently it's F3.

anyone else with this issue?

Flash to F6 and problem will be solved.

CPU Support List

Bios Update Download

F6 is needed for it to run properly problem solved.

update: I'm still weary about flashing the bios, so I've been tinkering with settings and I started up EasyTune6, a program that came with my motherboard. Also to verify things a bit I installed CPU-Z. Now in EasyTune6 there is a Quick Boost feature that I haven't used before and thought I would give it a try. Quick Boost has 3 levels and I started with level 1. This would appear to raise the Bclk from 133 to 140, and the core speed from 2.66 to 2.80Ghz. So what I got was a Bclk of 140, a core speed of 3.35Ghz, and a multiplier of 24x, as shown in cpu-z.
So I went back into the bios and I still could not change the multiplier or the Bclk. Are there other settings in the bios that will free up the multiplier and Bclk ? Why can I change those settings in a Windows program and not in the bios ?
Any thoughts.

I am officially a noob.. at overclocking anyway. In the bios, I would select the cpu clock ratio and press enter, instead of page up or down to change the value.

on a different note, has anyone seen core speed and bclk differences when using cpu-z and other programs, as in they show different values? I have cpu-z and easytune6 up and they show different values for the same thing.