Intel D975XBX, Core 2 Quad Q6600, 4GB (4x1GB) Corsair DDR2-800.
Once you supply the correct model, I can provide a full write-up including specifications, supported CPUs, RAM limits, driver sources, and known upgrade paths. Intel Desktop Board 21 B6 E1 E2 Er
Alternatively, remove the silver coin battery for 30 seconds. Intel D975XBX, Core 2 Quad Q6600, 4GB (4x1GB)
The results were the usual noise: Help, my PC won't start. Beep codes Intel Desktop Board. Garbage output. Core 2 Quad Q6600