Ok, here is my question.. right now i have 2 sticks of 256mb Corsiar PC-3200LL running in dual channel. I am running it at 420Mhz fsb rock stable. the specs on these chips are: Specifications: Speed 400 MHz Organization 2 x 32M x 64 CAS Latency 2-2-2-6-T1 Memory type DDR Part number: TWINX512-3200LL Ok, i used to have 768mb of ram before i built this setup, and i miss it.. i can tell a difference and really want more ram. Since i am doing the dual channel thing i guess the only option i have is to get 2X512mb sticks of ram. I only have like $220 to spend on these new sticks of ram. Well, the ram i have now has the timing of 2-2-2-6-T1 and runs fine at that timing overclocked to 420mhz. Here is what i want to know, i am looking at getting 2 sticks of this ram: CORSAIR MEMORY XMS Extreme Memory Speed Series 512MB 32MX8 PC-3200C2 With Heat Spreader Specifications: Speed 400MHz Organization 32MX8 CAS Latency 2-3-3-6-T1 Memory type DDR These chips are only $109 a piece at newegg. They have slower timings of 2-3-3-6-T1. Here are the questions i have. 1. Will these chips run at 420Mhz easy without relaxing the timings any? 2. If i buy them not as a "Twinx" set, will they still run fine in dual channel? 3. How much slower will they be since the timings are slower than my current ram? Ok, thanks!!