My last ram purchase was 4 years ago for bleeding edge pc2100. I recently began purchasing new equipment and I am at the ram stage now - my motherboard - Abit AN8-Ultra - accepts DDR400 with dual channel and all that good stuff. I was browsing Newegg and found these two items: CORSAIR XMS 1GB (2 x 512MB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory - Retail Timing TCCD 2-2-2-5 price: $183.00 http://www.newegg.com/Product/Product.asp?Item=N82E16820145522 and this: mushkin XP3200 Dual Pack 1GB (2 x 512MB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory - Retail Timing 2-2-2 price: $165.89 http://www.newegg.com/Product/Product.asp?Item=N82E16820146355#DetailSpecs I am quite confused on the timing side of things - I mean, I remember way back when SD 100 ram had a timing of 2 or 3 - it was pretty much that simple. Now there are all these numbers - which ones are better to have lower? why is there 4 on the corsair and 3 on the mushkin?... any help is appreciated! also if you have some suggestions on different ram - please share! or any links to better prices price wise - the lower the better. 180 would be my absolute top spending price for ram.