When I switched to the 430 watt Enermax, from a generic 300 w, I gained around 150 MHz, so I would say yes, start there.
As for the multipliers, yes I have seen where 13 gives a 12.5...it was an older board ...my A7V I think, that didn't support the newest cpu's though. I have never tried 14 or 15 before, so I can't say. I use lower multi's and higher fsb, for the memory throughput.
Check the MB maker's web site for a bios update maybe.
|