I heard that windows xp performance with high-end system (I mean, a quad-core processor) is very poor compared to windows vista... is that true?? and I read that just the professional edition support dual-core processors... is that true?? and does it support a quad-core processor??
I'm dual booting between WinXP Pro 32 and Vista 64 Home Premium, with a quad core CPU, and 4G of system memory.
WinXP hasn't had the first problem doing anything I've thrown at it to do and I haven't had to disable any cores to do it, WinXP has done some of the fastest DVD ripping to hardrive I've ever seen with the quad core CPU.