Intel 865G P4-800/533/400 FSB ATX ( BOXD865GLCL ) Intel 865G chipset Support Pentium 4 processors 1.60a, 1.80a, 2a, 2.20 GHz and higher with Hyper-Threading Technology 400/533/800 MHz FSB DDR266/333/Dual Channel 400 MHz memory supported 4 DIMM Slots for up to 4GB in memory