Problem with stock settings

[ElvishBoy311]

Athlon 64 3800+ AM2
Asus M2N-E
Corsair XMS 2x1GB PC6400 5-5-5-12-2T
FSP 450W
Sapphire x1800xt 512 stock w/ zalman 700cu

Not really sure where to post this since its multiple questions. I wanted to overclock and noticed the strange voltage in cpu-z. Bios was set to default for voltage so I manually changed it to 1.35, restarted and cpu-z showed 1.216

Also, I was under the impression the ram should be running 1:1 instead of 5:6 (166) I'm probably mistaken though, don't totally understand how that works.

Just wanted to confirm these numbers are right and can begin overclocking. Thanks