ADVenturePO`s Cinebench - R15 score: 4522 cb with a Xeon E5 2690 v4
CPU Benchmarks - Intel Haswell-EP Xeon 12 Core Review: E5-2650L V3 and E5- 2690 V3
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. :
Overclocking Xeon 2690(v2) | TechPowerUp Forums
Dual Intel Xeon E5-2690 UnixBench Single Threaded - ServeTheHome