Hello, I'm new here but I was hoping someone here could help me. First, a little background. I've been "tinkering" with my current PC (IBM Aptiva E56) trying to tweak as much power out of it as I can. I think I've done as much as I can with it. I'm now considering building my own PC and have a few questions about some of the components. Here is a list of the components I’m considering- Motherboard: MSI 865G Neo2-PLS (MSI Part No. MS-6728-090) CPU: Intel Pentium 4, 2.80C GHz (Intel Part No. BX80532PG2800D) RAM: Kingston ValueRam, PC2700 512MB x 2 sticks (Kingston Part No. KVR333/512) Hard Drive: Western Digital, 160GB 7200RPM, IDE (Western Digital Model No. WD1600JD) ATX Case w/400 Watt power supply Here are some of my concerns: 1. The CPU specs for the MSI motherboard mentions the FSB as follows: “FSB 400 (for Northwood only), 533, 800MHz” What does the disclaimer about the Northwood CPU refer to? Does that mean it will only support the Northwood CPU if it has a 400 FSB? Or does that mean the Northwood is the only CPU that comes with 400 FSB, that the Prescott CPU doesn’t offer a 400 FSB? This concerns me because the CPU I’m considering is a Northwood 800MHz CPU, will the CPU I’ve chosen work on this motherboard? 2. The Main Memory specs for the MSI motherboard reads as follows: “Supports four unbuffered DIMM of 2.5 Volt DDR SDRAM” “Supports up to 4GB memory size without ECC” What does “unbuffered” and “without ECC” mean and are my memory modules compatable with this motherboard? Also, Main Memory reads: “Supports Dual Channel DDR266/333/400/433/466/500/533 MHz and up” Do the memory modules have to be used as Dual Channel? Or can they be used as Single Channel? Also, I’ve been unable to verify whether or not my memory modules are Dual Channel compatable, I’ve read some specs that say “not Dual Channel compatable” but I’m not sure. 3. The hard drive interface is IDE ULTRA ATA 100, the motherboard is IDE ATA 100. Will “ULTRA ATA” interface work on just plain old “ATA” interface? Any help you could give me on these questions, as well as any other suggestions you may have, would be greatly appreciated. Thanks a bunch!!