Barto, with a stick of pc2700 in and a stick of faster ram in, your system will only run at the spoeed of the slowest component. if you get a stick of 3200 you should take the 2700 out. i havent seen many good boards out there that run two speeds of DDR. i dont recall seeing one that runs 2700 and 3200 either, they are mostly 2100 + 2700 or sdram and ddr boards. Maybe i just havent looked enough