Question: Can I install 4 DIMM of DDR SDRAM with P4 FSB 533 MHz CPU on P4VX4 motherboard?(7/9/2003) Answer: If you are using P4 FSB 533 MHz CPU on P4VX4, please install 3 or less than 3 DIMM of DDR SDRAM. When you install 4 DIMM of DDR SDRAM, they would run at DDR 200(PC1600) speed. According VIA chipset SEPC, FSB 533 MHz CPU must run with DDR 266 or higher speed memory. So if you install 4 DIMM of DDR SDRAM, please run with FSB 400 MHz CPU.