First of the two Benchmarks for ARR.

[Dhalmel]

Theyre locked to 2 cores cuz its a 32bit game. *(confirmed by it being in the program files x86 folder) maybe 2.0 will be 64bit and be able to access more than 2 cores and 4 gigs of ram

32bit applications can use more than 2 threads/cores..
For example:
Skryim is a 32bit game, but can take advantage of quad and hexa core cpus.
32bit applications in theory can use up to 32 threads/cores.