对于很多用户来说，一台完美的PC主机可以说是终极目标，它需要尽量小巧，能够摆放在电视旁边而不显得格格不入，还要具备强大的性能、良好的可升级性。而困难的部分就在于，一般强大的台式PC的外形是很难做到小巧时尚的，但外星人的X51做到了这一点。

Alienware is largely credited for kicking off the micro-tower revolution three years ago with the original X51. The concept was simple: Take the typical business small-form-factor box, pull the PSU ...