Running fine here on A64 3200+/1GB RAM. I was very impressed by the beta so I installed RC as my main OS. It's not faster than XP, but also not slower and a lot less sluggish thanks to the improved memory management - that was the only gripe I had about XP, 30+ second HD grinding after minimizing and maximizing Firefox (just an example) even though there was a lot of free memory was driving me mad. Vista, in comparison, was totally unusable on the same machine.