Our research includes 188 expert total reviews for 17 best cpu processors under $650. The highest average score is 93%, while the lowest is 67% (a gap of 26%). There are about 11 reviews per product. Reviews come from sites like PCMag, Wired, and more. Click on a product to see more information (including which reviews were included). This list gets updated every few days as we routinely add the latest products.