OEM 8 Pro x64 fresh install on my Raptor drive with only drivers installed and Nvidia processes disabled.
1GB more RAM usage than 7 and 8 RTM. This is now a step
backwards for people who are upgrading for "more performance". If you don't have a quad core and 8GB of RAM, avoid this OS. This is without me installing Start8 and Classic Shell for the start menu and classic theme that I prefer. Or any other programs for that matter.