Well... thanks for responding guys. G.skill (the manufacturer of my memory) said that they don't sell these stick individually. Of course not, it's Tri channel... hence the Tri... So now I have to purchase another 3 pack of memory just to fit my memory slots. On top of that, I'll have to install the 64 bit of vista home premium to even utilize t that. G.Skill I must say, the hardware they sold me is fine. I give it 5 our 5 gold stars. But their customer service is extremely slow to respond. We're talking 2 - 3 days here. God bless them. So anyway, here's the latest: I've been over clocking my computer. I got my quad core (2.4 ghz) overclocked to 2.8 ghz. !! the only problem is, every time I set my fsb to 1600 My computer won't even boot to bios. It's so wierd. So, I changed my multiplier to 7x instead of the 9x that it was set at. Nothing. The only way I could overclock to 2.8 ghz was sacrificing the fsb for some reason... i think. I don't know... to be honest ... this over clocking thing is new to me. I don't think I can set my Memory to 1600. My machine become unstable. I don't know what I'm doing. If anyone is experienced with overclocking and knows a conservative overclock method for me to use; please let me know. I'll check back as you guys are faster than G.skill to respond! Btw my name is tom, so I like this website a lot. god bless guys! talk to you soon.