I´m quite sure you will not become happy with that! A Core 2 Duo E8600 (or a Core 2 Quad Q9650 if you need four cores for other applications) would work much, much better. GPL needs that high clock rates (especially from those older generations).
Yes imo the Q6600 is under the limit, but it seems well overclockable, 2cores are better than a single, one for OS and one for GPL:
Zitat i guess the q6600 is the most sold lga 775 cpu... back in around 2008/2009 there were so many people who had this cpu and i remember how good this chip could overclock... even with a crappy board and stock cooler you could reach 3 ghz almost certainly
So 3000MHz should be a minimum with standard VCore
Zitat Q6600 runs at 2.4GHz, or 2400MHz. It ran on a 266MHz bus, I think, so it has a CPU multiplier of 9. This also means your ram is running at 533MHz. To get to 3.2GHz there are several ways. I won't work out all the ways, but the easiest is to up the FSB to 400MHz, and drop the CPU multiplier down to 8. This will require DDR2-800MHz. If you don't have 800MHz ram then this won't work as well. If you left the CPU at 9, you could move the FSB to 355MHz, meaning DDR2-667 ram has a better chance of working. 333 vs 355MHz. Trying to push on to 3.4GHz will require an FSB higher then 355 or 400MHz. Depending on your ram, this may or may not be possible.
B3 vs G0 is the stepping of the CPU. B3s came first, and have a lower overclock potential. Nearly every G0 could hit 3.2GHz with more possible depending on chip.