If this is any help, I'm using quite a low spec system.
ASRock P4i65G motherboard.
Pentium 4 processor @ 3.0GHZ.
2GB RAM.
120GB HDD
Geforce 5200FX graffix card.
Installing GLDirect is a must with the above GFX card, it's not a GL-friendly card so needs GLDirect to bridge it.
PS. It runs like a bag when using AppGameKit Viewer fot iOS, due to it having to update both the screen on the device as well as the PC.