Mac Pro
Quad-Core

Mac Pro
6-Core

3.7GHz
Quad-Core
Intel Xeon E5 with 10MB L3 cache and Turbo Boost up to 3.9GHz
Configurable to 3.5GHz 6-core processor with 12MB L3 cache, 3.0GHz 8-core processor with 25MB L3 cache or 2.7GHz 12-core processor with 30MB L3 cache

3.5GHz
6-Core
Intel Xeon E5 with 12MB L3 cache and Turbo Boost up to 3.9GHz
Configurable to 3.0GHz 8-core processor with 25MB L3 cache or 2.7GHz 12-core processor with 30MB L3 cache

12GB
DDR3 ECC memory
12GB (three 4GB) of 1866MHz DDR3 ECC memory
Configurable to 16GB (four 4GB), 32GB (four 8GB) or 64GB (four 16GB)

16GB
DDR3 ECC memory
16GB (four 4GB) of 1866MHz DDR3 ECC memory
Configurable to 32GB (four 8GB) or 64GB (four 16GB)

Dual AMD FirePro
D300
graphics processors
Dual AMD FirePro D300 graphics processors with 2GB of GDDR5 VRAM each
1,280 stream processors
256-bit-wide memory bus
160GB/s memory bandwidth
2 teraflops performance
Configurable to dual AMD FirePro D500, each with 3GB GDDR5 VRAM, 1,526 stream processors, 384-bit-wide memory bus, 240GB/s memory bandwidth and 2.2 teraflops performance; or dual AMD FirePro D700, each with 6GB of GDDR5 VRAM, 2,048 stream processors, 384-bit-wide memory bus, 264GB/s memory bandwidth and 3.5 teraflops performance

Dual AMD FirePro
D500
graphics processors
Dual AMD FirePro D500 graphics processors with 3GB of GDDR5 VRAM each
1,526 stream processors
384-bit-wide memory bus
240GB/s memory bandwidth
2.2 teraflops performance
Configurable to dual AMD FirePro D700, each with 6GB of GDDR5 VRAM, 2,048 stream processors, 384-bit-wide memory bus, 264GB/s memory bandwidth and 3.5 teraflops performance