| Get 1GB. Trust me, it will be better than 512. I'm using 512 right now in the computer I rebuilt and it's rather miserable IMHO.
PC2100, PC2700, PC3200 are the relative speeds (the number actually refers to the theoretical bandwidth of the memory...the amount of data that can pass through the memory).
PC2100 = 2x133MHz RAM, PC2700 = 2x166MHz RAM, PC3200 = 2x200MHz RAM (the 2x is where the term DDR - double data rate - originates). These numbers tend to be interchangeable at your PC retailer. PC2100 might be sold as DDR266, PC2700 might be sold as DDR333, and PC3200 might be sold as DDR400. Confused yet?
Your Celeron's bus speed is 100MHz (technically it's 400MHz but we won't get into that- as far as the motherboard is concerned it's 100MHz), thus, the PC2100 will be fine. |