PassMark - CPU Benchmarks - List of Benchmarked CPUs
Intel Xeon E5-2690 V2 Processor (3 GHz, 10 Cores, Socket FCLGA2011) for sale online | eBay
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. :