The information is a bit easier & more streamlined on the Opteron side, so we'll start there. Opteron is AMD's 8th generation CPU (K8) aimed at server & high-end workstations. The Opteron CPUs require registered Ram & can use any JEDEC approved DDR Ram from PC1600 to PC3200. Offcially, PC3200 Ram is only supported from x46 & up. The support mention only means that you get technical support from AMD for registered PC3200 Ram from the x46 series & up only. That does not mean Registered PC3200 Ram will not work on CPUs below x46, you simply won't get support from AMD if you decide to go ahead with that setup. The Ram validation process might not mean much to end user but for servers & professional workstations, it is very important. The current Opterons are based of the Sledgehammer core which boasts 128k of L1 & 1024k of L2 caches. They all use the Socket-940 interface, the DualChannel integrated memory controller, 3 Hypertransport links ( two for inter-CPU data exchange, the last one being used to connect to the rest of the system ) & use a P4 like IHS ( integrated heat spreader ). All retail Opterons come with a HSF. Opteron 1xx for Single CPU systems 140 : 1.4GHZ 142 : 1.6GHZ 144 : 1.8GHZ 146 : 2.0GHZ 148 : 2.2GHZ 150 : 2.4GHZ Opteron 2xx for Dual CPU systems 240 : 1.4GHZ 242 : 1.6GHZ 244 : 1.8GHZ 246 : 2.0GHZ 248 : 2.2GHZ 250 : 2.4GHZ Opteron 4xx for 4-Way & 8-Way CPU systems 840 : 1.4GHZ 842 : 1.6GHZ 844 : 1.8GHZ 846 : 2.0GHZ 848 : 2.2GHZ 850 : 2.4GHZ Pictures Retail Package CPU Mugshot There are also low speed, low power parts to be released, I'll post more info on them as they become available. Do not post in this topic if you do not have any valid information. This is not the place for flames & such.