So far, I have upgraded my memory, cpu, and video card and have not had any major problems. I am using the 32 bit version of build 7000. Motherboard is Gigabyte GA-MA770-DS3 with a 550 watt power supply. Mem: added another 2 gigs of Corsair DDR2. CPU: went from Atholon X2 5000 to Phenom X4 9850* GPU: Gigabyte Radeon 3870/512 to HIS Radeon 4850/1GB** * With the Phenoms memory controller, you will now see “Ganged or Unganged” in Bios when you start your computer. I have mine set to Unganged which is supposed to be faster than Ganged. ** I have had problems with the Win7 Beta Catalyst suite crashing more than it should. I uninstalled it and loaded the Vista Catalyst suite and seem to have less crashing. The only other problem is with IE8, I cannot watch my Netflix Instant streaming movies. Other than that I am pretty impressed with the 7 beta. When the RC is out, I will probaly move to the 64 bit version and go up to 8 gigs of memory.