They have different drivers I know... but for the same price, the specs are different. That's sort of what I was wondering. For example GeForce 480: $450 CUDA Cores 480 Graphics Clock (MHz) 700 MHz Processor Clock (MHz) 1401 MHz Memory Clock (MHz) 1848 Standard Memory Config 1536 MB GDDR5 Memory Interface Width 384-bit Memory Bandwidth (GB/sec) 177.4 Quadro FX 1800: $450 CUDA Cores 64 Core Clock (MHz) 550 MHz Memory Clock (MHz) 800 MHz Memory Size Total 768 MB GDDR3 Memory Interface 192-bit Memory Bandwidth (GB/sec) 38.4 So.... yeah.