Just a guess

[aero]

to me it seems that many people with the amd processors are having the most trouble with running the game can someone else confirm this or prove me wrong?

[Warspite]

Yes -the older Athlons (usually at 1.3Ghz and below) were definitely a problem when the demo came out. As far as I know, the full version of the game should have been patched to deal with this.

[Baldo Herlesien]

My Athlon is new FX53 & I had problems, but the graphics drivers seem to sort it out