probably its downclocked since its idle, but if u stressed it, it should go full speed. strange... have u been messing around with the bios? try to dissable EIST in bios to keep the cpu at full multiplier.
I can't set the FSB in bios.
Also something called clock speed is at 200 MHz.
If I change it to 265 MHz (the most it lets me) it raises the CPU speed to 1800 MHz.
But then it sometimes freezes in games, making me restart the computer.
What model is your board and if it is vintage (early 775) thin ditch it for some thing better with a P43/45 or a 750I/780I since they are cheap and work better most of the time. You can get them on newegg or you could roll the dice like what I did and got lucky on a xfx 780i for $38.77 (US) after shipping and RMA.
So now I get around 2 GHz.
Still not the whole 2.4 though...
Does anyone else have any ideas, before I flash the bios?
The bios is dated regardless and is not reading the correct multiplier. Many foxcon boards (the el cheapo al crapo) won't let you adjust the multiplier so give the update a try and see what happens next.
the clock speed in your bios you're talking about should be the bus speed in cpu-z. that's an fsb800 processor and the 177.3 x 4 = fsb709.3, which it shows just below it. you're underclocked. if i were you i'd download a new revision of the bios and flash it. or if there is no newer one, reflash with the current one. oooor at the very least clear your cmos so all of your settings go back to defaults and give'er one more go.
oh and your multiplier is just fine, cpu-z shows it as x12 which is what it's supposed to be. 200x12=2400mhz. you've just got somethin wacky goin on there.
I have a spare Bios chip. Is there anyway to boot with the Bios chip that works, then swap it for the other one?
Would it work?
Just incase it doesn't flash ok.
You might as well get a new board because tracking down another chip if you could even remove it will very difficult now give what others have suggested or flash it. Look for a nice problem free board on newegg for like $40-$75 if all else fails.