What is DDR2? Well, it’s a new memory standard, as defined by JEDEC (Joint Electronic Device Engineering Council), whose members include many of the major computer memory and chipset manufacturers. JESD 79-2A to be exact. DDR2 picks up where DDR memory currently stops, at 400MHz.
Addtional Memory Links from around the Web:MEMORY
- PMI 1GB DDR 400MHz PC3200 Dual Channel (2x512MB) Platinum 2-3-2-6 @ EXTREME Overclocking
- Corsair XMS4400 TWINX DDR550 @ themodfathers
- Shikatronics ShikaXram 1GB PC4000 @ MBReview
- GeIL Ultra Platinum PC4000 Dual Channel 1GB Kit @ SubZeroTech
- Mushkin 512MB PC4000 Dual Pack (2×256) Memory @ EXTREME Overclocking
- Mushkin Enhanced 1 GB PC4000 DDR Memory @ SystemCooling
- GeIL 256MB PC3200 400MHz DDR Value RAM @ TechIMO
- Article: DDR2 Is Soon To Be A Common Enthusiast Part, But What About Cost! @ Legit Reviews
- PMI 3200-1024DPL DDR 400 Duel Channel Platinum Memory @ Ascully
- GeIL Ultra Platinum PC4400 @ GruntvillE
- Article: GDDR4 memory standard on the horizon @ CoolTechZone
- Article: Hynix responsible for DDR SDRAM price drops @ CoolTechZone
- PMI PC4200 Platinum Memory Kit @ BYTESECTOR
- Article: PCI Express and DDR2 Ready to Occupy the Market? @ X-bit labs
- PMI 1GIG DDR400 Platinum Turbo Dual Channel Memory Kit @ Tweaknews
- GeIL Ultra Platinum 1GB Dual Channel PC4400 @ Envy News
Introduction to DDR-2 & More

PCStats has done an excellent job of explaining the upgrade from DDR to DDR2.