Gateway P4 Profile 5 Socket 478 P865G System Board. Part Numbers: 4000906 2520934 2521170 2521171.CPU Support: Type: mPGA packageClock: Northwood FSB400/533/800 MHz CPU, Prescott FSB800 MHz CPU, or Celeron FSB400 MHz CPUSocket: 478-pin.System Chipset: Intel® Springdale-G (Intel 865G + ICH5).BIOS: Memory size: 4 Mb Award First BIOS, Type: Flash ROM for LPC bus.Main Memory: Type: DDR DRAM PC2100/2700/3200 (266/333/400 non-ECC support)DIMM: 2 slots 184 pins, single and double side support (dual channel)Maximum: Up to 2 GB for unbuffered DDR module.L2 Cache: In CPU (128 KB in Celeron / 512 KB in Northwood / 1 MB in Prescott).Clock Generator: Chipset: Cypress CY28404 (48-pin).PCI IDE Chip: Chipset: Intel ICH5Parallel ATA: Parallel × 2 channels (Supports Ultra DMA 33/66/100)Serial ATA: 1 port.