i have 512Meg of Crucial PC2100 in a system that I just put an XP1700 that i know runs fine at 200MHz FSB... i have it running prime95 right now at 166Mhz and doing fine... thats half way there from default 133Mhz and where i want to go at 200Mhz... im wondering what you other geeks out there have seen this memory do???