Intel Core i5-6500T vs Intel Core i5-6600

A capable low-power option in 2015, the i5-6500T sacrifices clock speeds for efficiency, making it strictly a budget/SFF salvage part today.

Best for: If you are buying a refurbished SFF office PC (like an HP EliteDesk or Dell OptiPlex) for basic home server duties, web browsing, or as a thin client, the i5-6500T is perfectly adequate. It runs incredibly cool and quiet, making it great for a living room PC that only handles 1080p streaming. However, you should never buy this processor standalone to build a new PC. Its low clocks and locked multiplier severely limit its potential, and modern low-power alternatives offer significantly better performance-per-watt. If you already own it, max out the RAM and add an NVMe SSD to extract the best possible everyday responsiveness, but do not invest in a dedicated GPU expecting a great gaming experience.

The i5-6600 was the ultimate locked gaming chip of 2015, boasting high boost clocks, though modern users will find its 4-thread design a major bottleneck.

Best for: The i5-6600 is a solid drop-in upgrade if you are currently running a Pentium or i3 on an LGA 1151 motherboard and can get this chip for dirt cheap. It offers a noticeable bump in single-core speed and cache over lower-tier Skylake chips, making your system feel much snappier for daily use and older games. It’s also a decent holdover chip if your main CPU died and you need a cheap replacement. However, buying this to build a new system is a mistake. Modern budget chips like the i3-12100F offer vastly superior single-thread and multi-thread performance, alongside modern platform features. Do not overspend on this legacy hardware; your money is better saved for a modern platform overhaul.