SKU: Mac Pro Xeon
https://everymac.com/systems/apple/mac_pro/specs/mac-pro-eight-core-2.8-2008-specs.html
Apple Mac Pro "Eight Core" 2.8 (2008) Specs
Identifiers: Early 2008 - MA970LL/A - MacPro3,1 - A1186 - 2180
The Mac Pro "Eight Core" 2.8 (Early 2008) is powered by two 2.8 GHz Quad Core 45-nm Intel Xeon E5462 (Harpertown/Penryn) processors with 12 MB of level 2 cache per processor (each pair of cores shares 6 MB), a 128-bit SSE4 SIMD vector engine, and 1.6 GHz "64-bit dual independent frontside buses."