If you sett your RAM timings tighter than your RAM modules will handle, you'll experience freezes, lockups and so on. It's best to stick to manufacturer recommended timings unless you are fully aware of what you are doing and what the effects will be. There are tools you can use, such as memtest86, which allow you to test your RAM for stability.

Ok, I have narrowed it down to these builds for my upcomining computer. Before I list them, however, I have a couple of questions. I know very little about RAM and how it works, sadly. Right now I have some inexpensive Rosewill pc3200 RAM picked out. It looks fine and the reviews are good, but my questions is, what sort of performance increase would I be looking at if I got the same amount of high quality pc3200 OCZ RAM? Would it be cost effective to think about getting high quality RAM. Now, for the builds
BUILD ONE

1) RAM: 1 gig (2x512) pc3200 pqi DDR ram (http://www.newegg.com/app/ViewProduc...141-164&depa=1)
2) CASE: Aspire X-Superalien Case w/ 500W PSU
3) CD/DVD BURNERamsung DVD/CD burner (http://www.newegg.com/app/ViewProduc...151-204&depa=1)
4) CPU: AMD 3500+ or 4000+ (undecided!!)
5) HARD DRIVE: Samsung 160gb HD (http://www.newegg.com/app/ViewProduc...152-014&depa=1)
6) MOTHERBOARD: Soltek K8TPro, Epox 9NDA3+, or the Abit A8V
7) VIDEO CARD: Nvidia 6800ultra or ATI X800XT PE (undecided)

BUILD TWO
Same as build one, but the Asus A8N-SLI standard mobo and a 6800GT
pci-e video card.
Thanks for reading, any and all input is welcome! PLEASE, if you see ANYTHING wrong tell me!