Intel Xeon E3-1220 7-Zip CPU Comparison - ServeTheHome
Intel Xeon E3-1220 v3 vs Intel Core i5-4570 Benchmark, comparison and differences
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+Xeon+E3-1220V2+3.1+GHz+Quad-Core+%28CM8063701160503%29+Processor for sale online | eBay