Aces High can and does use 2 cores..... AH has been doing this for a good long while now, but it only works for INTEL Dual or Multi Core cpu processors........ not AMD Dual or Multi Core cpu processors...... those of us with AMD multi core CPUs are handicapped to only having one core utilized when playing Aces High.... Aces High does not allow the AMD's to use more than just 1 core.......... it has always been this way
even though, AMD's being relagated to only being able to use 1 core in Aces High does not really keep a person from being able to play the game at max advanced graphical settings if the person has done their homework and built a system to handle what Aces High can throw at it......
If one does their research and picks the right components that will work well together, they can build an AMD based PC that will take everything Aces High can dish out, yet still save a good bit of money
edit: yes like guncrasher mentions, if one has a fast quad or six core AMD processor they prob want see much decrease in performance verses someone with a slower quad or six core AMD cpu
like this AMD Phenom II X6 1035T Thuban 2.6GHz : one might not be able to max everything out in AH but using this ---> AMD Phenom II X6 1100T Black Edition Thuban 3.3GHz, 3.7GHz Turbo , they could max everything out and not see any decrease in performance ( although all the other parts in their PC build would be important also, especially their PSU, Video Card and Memory.. etc oh and cooling of components ability )
hope this helps
<S>
TC