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Intel Xeon E3-1220 V3 3.1ghz Lga1150 Processor CPU SR154 for sale online | eBay
Intel Xeon E3-1220 V5 PassMark Single Thread Mark - CPUAgent
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 E3-1220 V6 Photoshop CC 2019 Benchmark - CPUAgent