I'll disagree. Games continue to be designed around a single-core.
http://www.cpubenchmark.net/singleThread.html Shows the CPU has having a passmark rating of 947
If you check the requirements page, It simply says "Intel Core 2 Duo", without defining which model (Laptop models will be around 1.5Ghz and certainly insufficient, but the single thread of the x220 is 'better' than the first Core 2 Quad Core Intel chip) So it may be sufficient, history has proven that "minimum" requirements are meaningless, and only means that it will run, not run well.
The Video card on the other hand is substantially below minimum requirements.
http://www.videocardbenchmark.net/mi...ange_gpus.html
Radeon 3000 has a score of 106
The minimum requirements of a HD 4770 (which is a mid-range card of that family) which has a passmark rating of 1,068 (
http://www.videocardbenchmark.net/high_end_gpus.html )
So you need something that is as capable or better.
I can tell you right now that the current mid-range card, the 7770 (which is twice as fast as the 4770), can run the game at maximum settings and get around 24fps.
If I didn't know better I'd say that it sounds like your PC is a frankenbox that someone slapped different parts into. When I check 3DMark's benchmarks, there is in fact a combination matching your configuration.