Intel Xeon E3-1220 v6 vs Intel Xeon E3-1280 v5: What is the difference?
Intel Xeon E3-1220 vs Intel Xeon E5-2620: What is the difference?
Benchmarking Performance: CPU Encoding Tests - The Intel Xeon W Review: W-2195, W-2155, W-2123, W-2104 and W-2102 Tested
CPU-Z Benchmarks on various Synology models - Hope this helps give a rough idea of the CPU power difference between models. Also included 2 other VMs running on Windows Hyper-V Server. :