Hi all, if been reviewing your posts (present and past with great interest. I've spent several months going from P3 to P4 to AMD XP back to P4. I recently came to the conclusion that for me the P4T-E was the way to go. You've convinced me that the P4B266 demands my attention. I'm planning to eventually (soon I hope, although SONOFSMAUG has me extremely discouraged) build a DAW for use with the Delta 66 Omni that I already have and the Sonar that I hope to get. So far it looks like the P4B266, P4-1.6a or 1.8a, nor-raid, non-SCSI, non-overclocked, Evermax 365 PSU, 2 hard drives, CDROM, CDRW, etc. This post will hopefully get me closer to the ultimate DDRRAM, which so far I an thinking will be one stick of 512MB to start. In a previous post the following recommendations were made: CAS2, unbuffered/unregistered/non-ECC/gold on gold or tin on tin. I've been investigating memory availability and price for 512 MB and found the following: Crucial CT6464Z265, 512MB, PC2100, CL2.5, Unbuffered, 6 layers, $174 at Newegg Kingston KVR266X64C25/512, 512MB, PC2100, CL2.5, $136 at Mwave. Corsair CM64SD512-2100, 512 MB, PC2100, CAS2.5, $162 at Mwave Corsair CM64SD512-2400, CAS2, $181 at Mwave Micron MT16VDDT6464AG, 512MB, PC2100, CL2.5, $168 at Mwave. Questions: 1) which one from the above or is there better? 2) It appears Cas 2 is not available in PC2100 3) How do you know if the connectors are gold or tin, and what is the P4B266? 4) Is there any advantage/disdvantage or to going with PC2400 or up if you are not overclocking? 5) What is "6 layers? Sorry for the length of the questions, but I've got at least a thousand left!