Q8200 is faster than Q6600 clock for clock, runs cooler and consumes less power. If your target is only 3.2Ghz, I'd go with Q8200. Math shows that you only need FSB of 457, which isn't all that difficult.

To get your RAM to DDR2-914, which is what you need for FSB457, give it more voltage (around 2.1 to 2.2 should be ok) and loosen the timings a bit. Run memtest to verify.

Haha that's a motherboard issue, not core issue =p 4.2Ghz is 600x7, even 3.8 is 543x7..what's the limit for UD3P?

Ic ic..yupz kinda thought the limit was around 500FSB. I personally felt it with the Tpower+Q9450 last time, even 505FSB needed drastic voltage d.
Anyways, sorry to TS for taking this thread OT, just wanted to confirm the limits with OC4/3 =p

Sigh nvm, I'm free (and in a good mood) so I'll explain from scratch.
Intel C2Q processor speed is determined by FSB times multiplier. In a Q8200's case, that figure is 333Mhz(FSB) x 7(multiplier), which gives us 2.33Ghz. Since your multiplier is low, that would mean that to get to 3.2Ghz you require 457x7. (Intel FSB figures are quad pumped, i.e. FSB1333=333.33Mhz, DDR figures are double pumped, i.e. DDR2-800=400Mhz).

Another issue is your RAM. The lowest speed you can run your RAM at is 1:1 with your FSB speed. Thus you require DDR2-914@457FSB, overclocking your RAM by 57Mhz.

Next let's talk about Q6600. To get 3.2Ghz with Q6600 is really easy. Q6600 is 266x9. To get 3.2Ghz, you want 400x8 (you can set multiplier lower, but not higher than what Intel gives you). 400x8 is ridiculously easy since your RAM and board are running at spec.

However Q8200@3.2Ghz will be faster than Q6600@3.2Ghz I'd say by 8-10%. Also, Q8200 runs cooler and consumes less power.
http://www.pcgameshardware.com/aid,660917/..._and_Phenom_X4/

Finally let's talk about practical limits. New Q6600s rarely get to 3.6Ghz, you're most likely to get to 3.2 or 3.4. Q8200@3.2Ghz will outperform it.

So in conclusion what I'm saying is not that UD3L+KVR can take Q8200 to 3.2Ghz without a problem, it will be able to do it, but with proper tweaking. That tweaking is IMO worth it, to get the 8-10% performance and the power and heat savings over Q6600.

Now to get your FSB to 457, take it slowly. Go to 400x7 without messing with Vcore. Set Vtt to 1.35V, Core GTL Ref 1 to 0.63x, run IBT 10 loops and test for stability. Then go up 5Mhz at a time, whenever you fail IBT increase Vcore or Vnb 1 notch.