HotHardware.com posted a review on the Dell XPS 730x H2C Intel Core i7 Gaming System

We evaluated the original Dell XPS 730 in early May, shortly after its initial release. At the time, it was Dell's latest high-end gaming machine and word on the street was that it would be the last to carry the XPS badge. Moving forward, Dell was to concentrate on their Alienware gaming brand and the XPS brand would lose its gaming focus to embrace multimedia and content creation. Naturally, we checked with Dell directly, and while they did confirm the rumor, they also assured us that the XPS 730's life wouldn't be cut short and it would go one to live through a full product cycle. It seems they weren't bluffing.

Shortly after Intel released their new Core i7 processors about a month ago, Dell announced an update to the XPS 730 with Core i7 tech under the hood. The new XPS 730x is first and foremost a technology update. The Intel Core 2 processors and NVIDIA 790i Ultra SLI chipset powering the original XPS 730 have been swapped in favor of new Core i7 processors and Intel's X58 Express chipset. The XPS 730x retains the original 730's ability to support both Crossfire and SLI and as such the latest graphics options from both the green and the red camp are available. Click the link below and check it out...

Dell XPS 730x H2C Intel Core i7 Gaming System Review