Re: DDR RAM compatibility question.
The computer you will purchase will have a motherboard bus frequency. You should always have memory that will match the bus frequency.
PC3200 have 400 Mhz frequency
PC2700 have 333 Mhz frequency
PC2100 have 266 Mhz frequency.
If you put a memory stick that has a memory frequency less than the motherboard frequency, then you are creating a bottleneck, which means that you motherboard bus will only go as fast as the slowest memory stick installed. In your case, you will be having more memory but your bus will be slower.
So make sure that before you buy the computer that if the bus is 400 Mhz (or 800 Mhz FSB [front side bus], it has 400 Mhz or PC3200 memory sticks. If not, tell the dealer that you will only buy if there are the right memory for the system.
Too often there are systems advertized with 400 Mhz bus and with PC2700 (333 Mhz) ; its' a shame.
Asus P4P800 SE
Intel P4 3.2 Gig 1024 Meg PC3200 cas latency 2.5
RAID 0 2-36.7 Gig SATA WD 10,000 RPM
200 Gig WD ATI ALL-IN-WONDER 9600XT
6500 Kb bandwith Internet Connection