I am looking at purchasing a 2010 Mac Pro. The seller describes the configuration as a Mac Pro 5,1 Quad Core Xeon. In reviewing eBay listings and other sources for Mac Pro information I'm not seeing this as a typical configuration. I see listings for 12-core 3.46mhz, quad core 3.2mhz, 6-core 3.46, etc... but not much out there on a quad core 3.46 xeon. Is this a legitimate configuration for a 2010 Mac Pro tower? Any info would be appreciated. Thanks!