This Integral PC2-6400 DDR2-800 DIMM RAM Memory Module has a 512MB capacity & is compatible with 240-pin desktop PC DIMM slots, & a motherboard with DDR2-enabled chipset. Adding extra RAM to your computer will enable faster start-up speeds, better multitasking capability, & quicker operational speed with demanding modern-day files & applications. To ensure a trouble-free performance memory modules should be configured as uniformly as possible, & in particular they should share the same clock speed. Enjoy speedier computing for minimal outlay by installing this reliable 512 MB Integral PC2-6400 DDR2-800 DIMM RAM Memory Module!