It will simply offer more bandwidth and knowing that AMD places its memory controllers on the CPU it also means that it will show a bigger difference than Intel's DDR 2 capable chipsets.
Memory manufactures are thrilled as they will benefit the most. They will sell more DDR 2 800 than they ever imagined and the high end market along with mainstream will go toward the fast adoption of this fast memory.
AMD advises its partners to get some DDR 2 800 memory and to include it in DVT testing. It wants to be ready for all of the modules out there. DDR 2 also operates at a lower power level and it will indeed offer greater bandwidth. AMD thinks that the time is right for DDR 2. The desired speeds are there, it is available and the cost is just a little bit higher than DDR one. So there. ยต