It should just fine. I am a bit confused. what motherboard do you have?
ddr200 = pc-1600 mem clock 100mhz
ddr266 = pc-2100 mem clock 133mhz
ddr333 = pc-2700 mem clock 166mhz
ddr400 = pc-3200 mem clock 200mhz
Just want to check you mother board to make sure but if it is already running pc2700 pc3200 shoud be fine.