We've just reviewed the first Commodore system we've seen for several years, the high end XX. You can also see a video review here and admire its high quality paint job.

It's the fastest system we've seen so far but SLI performance still disappointed in many areas. We thought the problem lay with Nvidia's Vista drivers, however it turns out Microsoft is also part, if not all, of the problem.

The software giant has just released a patch to solve some of the problems associated with dual-GPU systems, claiming poor performance is because Vista "does not forward driver-render requests to the secondary GPU." We're currently testing with the new patch and hope to post results soon.

Until then you get the patch from Microsoft, here. Microsoft makes you jump through several hoops to get it; it will only email the patch rather than make it a freely available download.