I am running G3 on an old (close to 4 year old) Dell dimension 4300 with a old pentium 4 1.6 ghz processor with 384 mb of ram and a Nvidia GeForce FX5700 VE card. it runs pretty good on my setup with decent frame rate. I have to turn a few things off once and awhile or turn things down sometimes but that is usually if I am flying with a bunch of people on online multiplayer or if I am flying on a new field for the first time.