We're debating between:
- R820 - E5-4620 v2 - 2.6GHz - 8 cores, 20MB Cache, 1333MHz max memory speed - max of 768GB ram - 8 core
- R730 - E5-2620 v3 - 2.4GHz - 6 cores, 15MB Cache, 1866MHz max memory speed - max of 768GB ram - 6 core
I understand that we'd see better performance in the R820 for parallel processes, but would the R730's actually be better for SQL Server? Using a benchmark site it appears that the E5-2620 is faster (86.72 vs 70.30) but rarely is CPU the bottleneck on a SQL Server.
How should we decide? I am not asking for a product recommendation but what way to choose (SQL Server 2014 / rack mounted).