After 4 years I decided to OC my i5 6500, I just got a 25-30% performance boost (Stock: 3.2Ghz) : r/overclocking
Restored HP 600 G2-SFF Desktop PC with Intel Core i5-6500 3.2GHz Processor, 16GB Memory, 480GB SSD, and Win 10 Pro (64-bit) (Monitor Not Included) (Refurbished) - Walmart.com