I need to replace urgently the following workstation HP Z620 E5-2620v2/16Gb/256 GB SSD/K4000. Is anybody able to assist me in choosing a processor which has similar specs and performance? Thanks.
You will urgently need to contact HP, and have them tell you which processors are supported by their BIOS. Only HP can provide this information.
Or, are you asking about replaceing the entire workstation? If so, here are the specifications on your processor:
https://ark.intel.com/products/75789/Intel-Xeon-Processor-E5-2620-v2-15M-Cache-2_10-GHz Intel® Xeon® Processor E5-2620 v2 (15M Cache, 2.10 GHz) Product Specifications
In this case, you will want to look for processors that are roughly equivalent. You can use this filter to decide:
https://ark.intel.com/Search/FeatureFilter?productType=processors Intel® Product Specification Advanced Search