January 5, 201412 yr Most of testing was done on my already 3 year old (except for the SSD) dev machine with the following specs: GTX 570 1280MB VRAM AMD 1090T 6 @ 3,8GHz 16GB G.SKILL F3 12800CL7 @ 1600MHz 256GB SAMSUNG 840 PRO SERIES SSD Note that while I ran that system on Windows 7 Ultimate x64 I had no absolutely no crashes, no SMPA60, nothing. When I upgraded to Windows 8 at some point last year, it got a little worse and I might get a SMPA60 every two hours or so. Also I noticed on Windows 8 that the taxi bug occurs much more frequent. The system is pretty outdated, but it runs EFLC just fine with everything maxed out. However, if you check the forums, there are people with much better PCs who have problems with excessive FPS drops etc, the game is not optimized very well. That's all I can share. Thanks for the share. I have reverted back to win 7 ultimate x64 as well, because Windows 8.1 is not optimized for past games. It has DX11.1, i believe, and GTA4 runs directx 9.0. Hopefully the 280x runs better and last part remains is the CPU.