What is The Difference in Intel 845 PE and SiS 648? i got asus motherboard Asus P4PE Intel 845 Chpset with ddr 333 mhz support and up to 3.06 Ghz /2G memory/4x agp/ In Bios i can choose Memory (mhz)- 266/333/355 My friend got Asus p4s8x SiS 648 Chipset 8x agp/ata 133/3G memory/up to 2.53 Ghz in bios he can choose memory mhz 100/155/200 but maximum 200 why? what is the difference between chipstes Sis 648 and Intel 845 ? what is better? Thank You.