Coreinfo is a new freeware released by Sysinternals team. Coreinfo is a command-line utility that shows you the mapping between logical processors and the physical processor, NUMA node, and socket on which they reside, as well as the cache’s assigned to each logical processor. It uses the Windows’ GetLogicalProcessorInformation function to obtain this information and prints it to the screen. Coreinfo is useful for gaining insight into the processor and cache topology of your system.
Usage: coreinfo [-c][-l][-n][-s]
-c Dump information on cores.
-l Dump information on caches.
-n Dump information on NUMA nodes.
-s Dump information on sockets.
Coreinfo can be run by typing “coreinfo”. Coreinfo works on Windows XP SP3, Windows XP 64-bit, Windows Vista, Windows Server 2003 and Windows Server 2008.
Sysinternals definitely comes up with some really informative tools, I have been using their suite for some time.