Prior to installing the RAM, the motherboard had 512Mb DDR2 SDRAM at 533MHz installed. Now it not worked. Then I bought a new one which is 2GB Ram at 800MHz. When I installed 2GB Ram, it indicates 1GB. My motherboard is Asus MX1333. Does it perform with DDR 2 at 800Mhz. Is is damage my motherboard too??