Description Intel E7500 chipset, Up to 16 GB ECC registered DDR-200 memory in 8 DIMM slots, Supports only registered ECC memory. Non-ECC or unbuffered memories are not supported, Total: 6 PCI-X slots Max up to 2 64-bit 133MHz PCI-X, 2 64-bit 100MHz PCI-X, 4 64-bit 66MHz PCI, ATI Rage XL 8MB PCI graphic controller, To ensure system stability, a 400W (minimum) ATX12V power supply (besides the 20 pins, both 4-pin and 8-pin +12v power connector) is required.