Upgrading your CPU is easier than you might think. Alongside adding more RAM and a new graphics card, it's one of the most worthwhile things to do.

We've written before about how to build your own gaming machine - if you've done that, then you should feel fairly comfortable installing components. Upgrading your CPU is partly just reversing the original process to remove your current device and installing a shiny new one. 

There are a few prerequisites though. Like knowing which CPU to buy, will it fit? Is it worth the money? 

Follow our handy guide for everything you need to know to upgrade your CPU for more gaming juice. 

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Checking CPU compatibility

The first step is to check your motherboard's compatibility list. The manufacturers should have a list of CPUs that will work and that makes a first easy port of call. 

For our build we originally used the following components:

These are the only three parts of the machine we'll be meddling with during this process which keeps things nice and simple. A quick Google search reveals the list of CPUs supported by this motherboard

Intel also has a handy tool to find the right CPU to match your motherboard or vice-versa. 

Cast your eye over the list and you'll see you could easily upgrade from a Core i3 CPU to an uber-powerful Core i9 if you had the cash to splash. Once you know what will fit, you just need to find somewhere to purchase the upgraded CPU.

Ensure you have the right socket (in our case LGA1151) then find something with more power. We went for the Intel Core i7-8086K. Not a massive performance leap from the current CPU but perfect for demonstration purposes. 

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Additional tools for the job

As well as the new CPU, you'll also need a couple of other things to get this job done cleanly and neatly:

  • Something to clean the thermal paste off the current CPU
  • Some new thermal paste to apply to the new processor
  • An anti-static wrist strap (view on Amazon US and Amazon UK)

The easiest solution is this thermal compound and cleaning kit from Arctic Silver (available from Amazon US and Amazon UK). A cleaning compound, surface purifier, lint-free cloths and a fresh supply of thermal paste will work wonders for this job. 

The anti-static strap will ensure you don't accidentally damage the machine while carrying out the work. 

Readying your machine

An important part of ensuring your computer can handle the upgrade is to make sure you're running the latest BIOS version. This is easy to do thanks to a free piece of software known as CPU-Z.

This nifty tool not only tells you what CPU you're currently running, but gives you access to other data that includes the version of your BIOS and the date it was released. 

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Download and install the software, then click the "Mainboard" tab to see the BIOS info. Check this, then refer to your motherboard's support page to see the latest BIOS version. Download and install with care. 

Once that's done, you're ready to get started. 

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Starting the upgrade

Now comes the process itself. We'll break this down step-by-step to make it easier. Scroll through the gallery above to see each step for guidance.

Firstly you'll need to unplug your machine and find a nice flat surface to work on then:

  1. Attach the anti-static strap to yourself and to an earthing point - a radiator works perfectly.
  2. Unscrew the CPU cooler/heatsink and detach any cables that might get in the way.
  3. Set the screws aside and carefully pull the cooler off.
  4. Apply some small drops of thermal paste removal solution to your lint-free cloth.
  5. Wipe the worst of the compound off the CPU taking care not get moisture or mess on your motherboard.
  6. Repeat this process with the cooler/heatsink.
  7. Apply the purifier to another clean cloth and apply that on both the CPU and cooler/heatsink.
  8. Remove the lever holding the CPU in place, lift up the flap and gently remove the old CPU by lifting it by the corners.
  9. Ready the new Intel CPU, remembering the gold arrow in the bottom corner should point that way when installed. You're installing the new CPU in the same way the old one came out.
  10. Carefully and gently push the CPU into place.
  11. Replace the flap and ease the lever back into place to hold it down. 
  12. Ready the new thermal paste.
  13. Apply a small amount of thermal paste in a pattern that will cover the entire CPU but not come out of the edges. 
  14. Replace the CPU cooler, reattach and tighten the screws to keep it in place. 
  15. Remember to plug all necessary cables back in.  

That's it. Job done. Easy right? Now all you need to do is plug it back in, reboot your machine and enjoy the extra power.