Need HELP in getting the full out of my RAM.

[Aizal]

I had a similar problem as a guy here
http://www.houseofhelp.com/forums/sh...ad.php?t=73776

And after following the recommendation of underclocking my RAM to 667MHz, I finally can use my 8GB ram on all 4 banks.

However, I would want to know what can I do to get the optimum performance of both my motherboard and ram?
I wanted to use the ram with 4-4-4-12 timing but did not know how to achieve that. Can anyone lend me a hand and help this poor noob?

Appreciate if you could tell me what should I set on my motherboard etc etc.