I am interested to know if apple new product "mac pro" is suitable for running cpu+gpu studies, is it beneficial? 

Any one have experience running Gromacs on MAC pro?

how we can compare below systems performance ?  

which parameters should be set to get the best cost effective system,

how much RAM is required and so on ...

____________

configure1

3.7GHz Quad-Core Intel Xeon E5 processor

12GB 1866MHz DDR3 ECC memory

Dual AMD FirePro D300

with 2GB GDDR5 VRAM each

256GB PCIe-based flash storage1

cost = $2,999.00

+++++++++++++

configure 1-D700

3.7GHz quad-core with 10MB of L3 cache

12GB (3x4GB) of 1866MHz DDR3 ECC

256GB PCIe-based flash storage

Dual AMD FirePro D700 GPUs with 6GB of GDDR5 VRAM each

$3,999.00

++++++++++++++++++++++

configure 2-D500

3.5GHz 6-Core Intel Xeon E5 processor

16GB 1866MHz DDR3 ECC memory

Dual AMD FirePro D500 with 3GB GDDR5 VRAM each

256GB PCIe-based flash storage1

$3,999.00

++++++++++++

configure 3 

3.0GHz 8-core with 25MB of L3 cache

16GB (4x4GB) of 1866MHz DDR3 ECC

256GB PCIe-based flash storage

Dual AMD FirePro D500 GPUs with 3GB of GDDR5 VRAM each

$5,499.00

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