I bought trainz 12 nv3 I had a 2.6 processor 8 gig memory with a gforce 550 1 gig card this computer ran hot and frame rate was slow .. so I bought a cyberpower 3.5 processor 16 gig memory and put my video card ......framewas a lot better but started to get blue screen also the trainz program started shutting down a lot what happened computer guys