For socket A mobo, I have only tried Abit KT7 but shortly replaced by EpoX 8KTA+.
Follow w/ additional 8KTA2 for my wife's systme becuase I was so impress w/ 8KTA+'s stability and performance.
To be honest, I don't see any performance different gain from 8KTA2 over 8KTA+, but it does require less voltage to OC. (in theory, this shouldn't be the case but here is the reason)
I run T-750 at 950 at jumper setting of 1.825V, under the HW monitor it say, it run at 1.820V.
I run the same CPU at 950 at jumper setting of 1.825V, under HW monitor it say, it run at 1.855V.
Then I proceed w/ 1Ghz and set both at 1.85V, Plus model show it use 1.855V and A2 model show it run at 1.875V(which is more stable at 1Ghz on A2 model)