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BIOS is 1.3 or higher?Have you checked the manual for dual-channel config?Is Ganged-mode set correctly? Try the other mode.
Yes. With a processor change comes a clearing of CMOS. Don't forget to unplug power cable first.I have learned how expensive and hard to find good PSUs (alimentacion) are in South America - Panama, Chile, Argentina. What PSU have you got? The 9650 pulls 100W of the 12V line all by itself (~9A).