The following details:
Asus P4P800S series motherboards all support single channel DDR400 memory, 800MHz FSB, hyper-threading, and 1 AGP 8X, 5 PCI, 8 USB 2.0 and other functions. In addition, both motherboards can support ASUS wireless daughter card slots, and their motherboard BIOS can also support overclocking function.
In fact, P4P800S-E is an enhanced version of P4P800S, which has two DIMM slots on board and can support up to 2GB DDR400. On the other hand, P4P800S-E has three DIMM on board and also supports 2GB DDR400. The P4P800S adopts ICH5 south bridge, and the P4P800S-E adopts ICH5R south bridge, which can support serial ATA RAID. Similarly, P4P800S is equipped with 10/ 100M network card, and P4P800S-E is equipped with Gigabit network card. Other technical features are basically the same.