PassMark - CPU Benchmarks - List of Benchmarked CPUs
Intel Xeon E3-1220 Sandy Bridge Benchmarks and Review
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. :
Intel Core i5-7400 vs Intel Xeon E3-1220: What is the difference?
Intel Xeon E3-1220 review | 55 facts and highlights
Intel Xeon E3-1220 Handbrake Transcode CPU Comparison - ServeTheHome