BH-5 vs CH-5 vs CH-6.... ?

Ok, can someone help me with understanding the differences between BH5, CH5 and CH6 chips?

I understand that BH5 likes higher voltages and TIGHTER timings and CH5 likes lower volts and looser timings?

Is that accurate? Would I be better off with BH5 then on an Nforce2 MB?

Where does CH6 fit in?

Thanks...

BH5 is good for 225-240 7-2-2-2 (7 is the better timings for memory performance)

CH5 is good for 225-245 7-3-2-2

CH6 seems 6ns chip (like BH6) so....

You would be better off with BH-5 on amd i'd say.. maybe actually be better off with CH-5 though if you can't get Vdimm above 2.9

guess I asked a HARD question.... barely any replies...