Yay or nay? Ram going into my new system.

I know nothing of RAM, but that's not stopping me from building a system:
E8400, GF 8800gt.

I went for the cheap stuff since I've never seen too much of a gaming performance hit when using high quality RAM.
Never bothered to read the on site reviews. Now I'm thinking I might have made a mistake.

Anyway, here's the stuff:
Corsair Dual Channel TWINX 2048MB PC6400 DDR2 800MHz Memory (2 x 1024MB)
http://www.tigerdirect.com/applica [...] u=C13-2024
Yay or nay?

That RAM is fine in my opinion, Core 2 processors are fairly immune to slow ram unless its tooooooo slow which yours isn't.