These are on literally identical boxes, right down to the RAM, Optical drives and HDD. They all use the Biostar iDeq 200N, AXP 2800+, 512MB Kingston ValueRAM PC2700, Lite-on DVD/CDRW Combo, WD800BB, Panasonic FDD. But most importantly, they all use the motherboard that comes standard with the 200N. *EDIT* I'll give the ACPI/Power thing a shot and report back next time I build one of these suckers.