to say it “works well” on 7×64 is like saying daihatsu is an excellent performance car.. it’s rubbish – I’m 7×64, EVGA 790i ultra mobo, Intel Q6700@3.33GHz, 8g’s of OCZ ram (7-7-7-24-1T), and an EVGA GTS250 – and there’s no doubt that PPcs4 could easily operate 10 times faster and much more efficiently if it was written for 64bit architectures -trust, another 4 gigs won’t do a thing to improve PPcs4’s performance (unfortunately) – the only thing that will benefit us as Adobe PPcs4 customers/64bit OS owners, is to have an actual 64bit version >period<