Wow, dicking people for going with a newer Intel platform and then support of a outdated os...? EVGA lost my biz a while ago with their boards and issues with the 780s. Their Black's are nice looking but so many issues. The extra gold is gimmicky and reminds me of the bs of monster cables.
Windows XP is useful for some benchmarks that will still run on the OS; because it's the most basic version of Windows on the NT kernel it has the least overhead and you can get higher scores in some CPU benchmarks.