To add another bit of information to the behavior difference seen between the Intel and AMD multi-core systems. It seems likely that the AMD processor support is using processor affinity to tie the game to 1 core. Processor affinity is a feature where a given program is made to run on one or more specific cores. If the program in question can't use any more cores than it has been assigned to, this improves cache coherency and slightly improves performance. The Intel based systems seem to be lett
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