"Funny, I played a lot of PC versions of Xbox 1 titles on a Celeron OC'd to 464 MHz, a Geforce 2 MX, though I did have 256 MB RAM. Ran games great on XP."
Yes, XBox ONE.... The Xbox 360 is a completely different beast and is a new from the ground up redesign, including a PowerPC-family processor (FYI all current consoles use PowerPC processors). The original XBox was nothing more than a modified PC, which accounted for its size and power-consumption. It's also why there are a limited number of games from the original XBox that will play on the 360 since it must use a virtual machine and emulation to translate x86 opcodes to PPC.