I had a Nvidia Geforce 4600 ti that was released after il2.
It was considered one of the great graphics cards ever created and was top of the line.
It could not run il2 at respectable frame rates imho (30-40fps)...didnt stop me from loving the sim though.
My brand new $2000 pc(not including gpu) was in many ways rendered obsolete as well, it was a P4 1.8 512 memory
Cliffs of Dover performance wise does run better on current hardware and maybe the patch will fix that but its more likely that the gpu to run CoD at MAX is not invented yet.