I am at a crossroads of building a new system for work use. I have been using Win 7 64-bit since it was released, and am overall happy with it. My main question revolves around this - I am building a multi-monitor (4 to eventually 6) system primarily for 2D business work, some SageTV watching, and occasional video editing. So, here are the questions: Does Win 7 use more than 4 cores? I am of course thinking a SuperMicro dual Xeon board housing a pair of quad-core 1366 Xeons vs, an X58 high-end consumer board using a 920 series 1366 socket cpu. Also, I am upgrading any app I can to be 64-bit and multi-core aware. Is it frequently the case that, say, a Corel video editing app that can recognize 4 cores will recognize 8? Or MS 2007 or 2010 - do they see 8 or stop at 4? Obviously, it's nice to be able to do a virus scan and not have the system slowed down either. My main concern is this - typically quad cores, especially Xeons, get really expensive as clock speed goes up, so if an app, especially Win 7, won't really go beyond 4 cores, I'd rather have a single, faster (say, 3GHz) consumer 1366 series than 2 slower (say, in the lower 2GHz range) pair of quad-core Xeons. Bottom line - just wondering if most apps and Win 7 64-bit Pro especially care about more than 4 cores. If they don't, I'll concentrate on a higher-end 920 series. If they do, I'll go for a pair of quad Xeons at lower speeds. I can certainly see that overall my dual core Win 7 platform, even though it's at a higher clock speed, is slower and less adept at multi-taksing than my Q9550 system that runs about 1/2 GHz slower on each core. Thanks for any thoughts.