Using some of the resources in the forums, member Halx was able to install Windows XP on his UX490. He was kind enough to drop us some benchmarks, and as far as I know, this confirms that a UX490 running Windows XP is the fastest performing UMPC currently on the market. The meters above represent the total Crystal Mark score. Below is a breakdown graph comparing the UX490 running Windows XP, to an identical unit running Windows Vista. As expected, XP uniformly outperforms Vista in every area.