I think he talks about CPU overclock. I saw a post somewhere about i7-2600K overclocked and an old CPU, both tested with the same GPU (GTX 580). Sims are rather CPU intensive, so the answer is, yes, in complex simmulations of all kinds CPU overclock usually helps unless the GPU is really the bottleneck. Maybe your specs could help
The thread here:
http://forum.1cpublishing.eu/showthr...t=22448&page=2