Oh! and I'm currently using both Crucial and Corsair 256 meg pc2100 sticks. Corsair is evidently more fool-proof, but I didn't have any great success o'clocking it or even getting it to run at Cas 2 on my A7M266 Athlon 1.2 gig system. The root may be the A7M266 board, which I've never managed to get 100% stable -- despite other people's great reports to the contrary.
Building a new KR7A-Raid system with XP 1800 and 512 megs ECC memory. Decided to go with Corsair again. Watch-out though, the prices is shooting up! ;.)