What RAM to get for Z77 for OC above 2000?

[mikek753]

hi experts,

what RAM of 4 Gb or 8 GB per stick to get for z77?
What to look for when selecting RAM?

So far I see that RAM has to run at 1.5V due to Z77, so any OC RAM at 1.65+ will be out of scope. Is this correct?

What timing? CAS? etc are important?

I'm looking for performance, but not extreme at any cost RAM.
What brand to stay away from?

thanks.
Mike.