Most PC3500 RAM is able to do 2-2-2-5, and can take the most stress, mushkin especially because of the BH5 chip. I think theres some other RAM still with the BH5 chips, but Im not sure. Mushkin PC3500lvl 2 and Corsair XMS PC3500 are guaranteed 2-2-2-5. Im pretty sure all mushkin level 2 PC3500 and below can do 2-2-2-5. Im not sure about any other guaranteed 2-2-2-5 on PC3200.