Problem is finding a board that actually likes overclocking via the fsb. 790FX and 890FX will be fine but i'm not sure the OP has a board like that.
Yeah .. but it pretty much comes down to temps. It take another +0.05v to +0.075v to get a similar clock on something other than the -FX.
Surprisingly, same thing with the C2 stepping and C3 stepping -- the C3s will clock a bit higher on slightly less volts.
That PhII 945 is a C2 and will go 3.8GHz+ -- I just didn't want to go 1.45v+ (still in spec, though) to get there.
And I'm going to pop a 1055T into that motherboard this evening. I sold it six months ago -- and replaced it with a new chip when I found out how good the EO-stepping 'CCBBE CB 1013 CPCW' chips are for OC'ing.
955 and 965 are the SAME THING , amd just wanted people to get bragging rights, so they released the 965 which ONLY 200 mhz higher clock, you can get the same speed by raising the multiplier.
Lastly, I would not recommend you spending that much on the mobo as the new AM3+ processors and motherboards coming out this year, go for a cheap one then later upgrade to a AM3+ Mobo and after that go for a bulldozer chip !!
anyways, thats just my opinion, that rig will destroy anything in its path for current gaming....