Why did the Xbox outsell the GameCube?

[Rafie]

S.T.A.G.E. said:
The Xbox was sold as the most powerful console on the market to play third party games. Halo made it a staple, but it was mostly being the best console to play multiplat versions of third party.

Well I wouldn't say it was the best console to play multiplat third party games. It was marginally..heck only a sliver better than GC with the graphics. You really couldn't tell the difference between them. We we do know is that they both were graphically better than the PS2. That was apparent.