I have had 32 bit computers for a very long time, tried the first 64 bit years ago, but at the time there was no software to support it. My board died about ten months ago and I purchased AMD CPU and board since I had no boards available for my old duo Intel. It is a 64 bit CPU and I installed 8GB of high speed RAM with it. I updated Windows 7 to Professional 64 bit and run Photoshop CS5, which is natively written in 64 bit. The difference in speed is phenomenal. Since Windows 64 bit can handle more RAM, all other programs run better, because I have the RAM available for it. So overall the 64 bit is an improvement. If you can spend the money go 64 bit. If you can spend little more go Intel i7 4 cores. Runs much faster than AMD.