ZEN (the up and coming AMD chips coming this fall) will improve upon this quite a bit, so if you have AMD still, all is not lost. It's also consequentially why the AMD fx chips perform so poorly in it - AMD seriously skimped on the FPU's on their AMD FX cpu. That's the part of the cpu (called the FPU) that Beam uses for it's physics. It comes down to floating-point (formerly 'whetstone') performance. Those with an AMD fx cpu might have a bit of trouble with the bigger vehicles in this game, such as the commercial truck or the bus, but the recent higher-ghz intel chips don't have any issues.
However, aside of the Belaz's appetite for school buses (KRUNCH!), it works great, looks the part, and functions, too! Job well done. and it loves to eat the school bus heh heh. However, there's no denying that the bus is a wonderful addition to a CAR ACCIDENT game Of course so does the Belaz mining truck (forget where I found that). Sometimes I have to open one of my windows. It does heat up this bedroom, however, after a bit.
I have a 4790k locked into it's turbo setting while the game is on. Guess it depends on the AI work too, but I kept my AI paths pretty simple on my map. No, suprisingly they don't take too much more power to run than 8~10 covets.
