Processor core groups - What core is on what CPU? : r/unRAID
Overclocking a Xeon x5670 CPU to 4GHz - YouTube
Intel Xeon X5670 Dual 6 Core Processor 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. :
GTA V - Xeon X5670 - HD 7870 2GB - 1080p Normal - YouTube
Intel Xeon X5670 Streaming Benchmarks - CPUAgent
HPC and Encryption Benchmarks - AMD's 12-core "Magny-Cours" Opteron 6174 vs. Intel's 6-core Xeon