this motherboard is fully working and has been test booted into windows 2000 (see cpu spec pics from inside 2000) It's dual socket but comes with 1 2.4Ghz Xeon (prestonia) and 4Gb of DDR1 ECC Expansion slots are 2 PCI, and 4 PCI -X (not express), 2 dual IDE, 1 floppy, 1 SCSI I/O parallel port, serial port, PS2 keyboard and mouse, dual usb 1.0, Lan, and onboard graphics
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