From a purely technical viewpoint, there are no recommended requirements. However, for 'real-world' playable speeds, the following gives you good performance: • Windows OS: Windows XP or Vista • Linux OS: Any recent Linux distribution with a 2.6 kernel. • 3 GHz Processor • 1 GB Available System Memory • Available Hard Drive Space: A few MB for DeSmuME, 100MB or so for a bunch of savestates and savefiles. • 512 MB 3D Video Card (Nvidia GeForce), ATI cards are not recommended. • Sound Card. • Microphone. In general, the more GHz, the better. The faster memory, the better. DeSmuME benefits a little but from multiple cores but not as much as raw ghz. DeSmuME is at the moment, unfortunately, slower than no$gba. It is reported that a 3ghz core speed on a core2 or better will get virtually every game playable.