I got myself a 4gig (800Mhz) kit, and also a 2gig(1066 Mhz) kit, because I was not sure which I would prefer, so got both, now I see that I will not be anyhow running my mobo over 400Mhz FSB, so will then prefer to keep the 4Gig kit, and sell this.
Long story short, me and my friend were building rigs, and got extra stuff, (a camera and ram got repeat ordered by two people...lol..) so will sell whatever we don't need.