How to Overclock Intel CPUs: K-Series Guide

Learning how to overclock Intel CPUs starts with one rule: only K-series chips are unlocked, and the easiest way to push them faster is the multiplier — no base-clock tricks needed. If your chip ends in a K, you can overclock it; if it does not, you probably cannot.

Only K-series chips are unlocked

Intel sells most of its desktop chips locked, and only the K-series (and the rare KS) chips let you change the multiplier. Good examples are the Core i9-14900K, the Core i7-14700K and the Core i5-14600K — all of them are unlocked and all of them have real headroom. By contrast, locked chips such as the Core i5-12400F and the Core i5-13400F cannot be overclocked at all, which is why they are cheaper. Our Intel CPU guides list which chips are unlocked, and our overclocking basics guide explains the multiplier in plain terms.

What you need: a Z-series board and good cooling

You also need the right motherboard. Intel only allows overclocking on Z-series boards, such as Z790, so a B-series board will not let you change the multiplier even with a K chip. Cooling matters even more — 13th and 14th generation K chips already run hot at stock, so a good air cooler or a 240mm liquid cooler is the minimum for an overclock. Read our cooling guides before you buy, and look at our 14900KS review to see what a chip pushed to its limit looks like.

Two ways to overclock an Intel CPU

The simplest way is the all-core multiplier: set every core to the same speed, test, and raise it in small steps. The second way is per-core overclocking, where you push the best cores a little higher than the rest — more work, but a slightly better result in games that use only a few cores. Intel also offers its own software, Intel XTU, which lets you change the multiplier from inside Windows, although the BIOS is more reliable for a permanent overclock. Our step-by-step overclocking guide walks through the same process in detail.

A safe starting point for 13th and 14th gen

For a 13th or 14th generation K chip, a modest starting point is 100–200 MHz above the stock boost speed, with the voltage left on auto. Test it with a stress test from our best CPU benchmark software guide, watch the temperature, and only raise the voltage in the smallest steps if the chip becomes unstable. Newer Arrow Lake chips, such as the Core Ultra 9 285K and the Core Ultra 7 265K, run cooler and have less headroom, so the same modest steps apply — expect a smaller gain.

Watch the voltage on 13th and 14th gen

Be careful with voltage on 13th and 14th generation chips. These chips are already pushed hard by Intel, and high voltage is what causes instability and wear over time. Keep the voltage as low as you can, keep the temperature under 85°C under full load, and stop when the next 100 MHz needs a big voltage jump. Our how to benchmark your CPU guide shows you how to measure the gain, and our how long a desktop CPU lasts guide explains what heat does to a chip over the years.

The bottom line

Overclocking an Intel CPU is simple if you have the right parts: a K-series chip, a Z-series board and good cooling. Set the multiplier a little higher, test, and stop when the gains get small. If you do not have a K chip, a better chip is the way to go — see our 12900K guide for a cheaper unlocked option, and browse our overclocking guides for the next steps.