Windows Server R Standard Evaluation 64 bit System

System model: Power Edge R815Windows Edition: Windows Server R Standard Evaluation 64 bitSystem: AMD Opteron Processor 6380 2.50GHz (4 processors) (64 CPUs)Installed RAM - 256 GB 1333 DIMM MHz DDR3Temp Drive 1 - Samsung SSD 980 PRO 250 GBTemp Drive 2 - RAM Disk (110GB)

I have tried several configurations with this one the fastest r-16, u-512, v- 128; a total time of 284.729 minutes. What am I doing wrong? Please some guidance/kind help on how can I get better results.