I'm new to this forum but I guess it works the same way as any of the other forums I frequent. Here is my problem/situation: My Toshiba Laptop originally came installed with a 256MB PC2100 SoDIMM, wanting to get more memory I decided to buy Two sticks of 256MB PC2700 SoDIMMs to bring it up to 512. However, after doing so the performance of my PC on 3 different benchmarks shows that my PC is 75% slower than with PC2100 mem in. What is going on here? I would suppose that the faster memory would make the system faster, somewhat like our desktops. I believe the chipset is an Intel 845MZ. I've checked the BIOS of the laptop only to find nothing. The system recognizes the new SoDIMMs as PC1600, which is probably the reason for the slow down. SHould I be concerned about what the benchmarks are telling me? 