How to reduce GPU temperatures with liquid metal paste

We show you how to replace the thermal paste on your Nvidia GeForce or AMD Radeon graphics card with liquid metal paste, to make your GPU run cooler.

Apply liquid metal paste to a GPU

In this guide, we’ll show you how to apply liquid metal paste to your GPU, replacing the existing thermal paste, as this can massively reduce temperatures on both Nvidia GeForce and AMD Radeon graphics card. While your graphics card’s cooler is probably fine in itself, cheap thermal paste and thermal pads have regularly been found to hinder cooling, especially if they haven’t been applied properly.

This can result in your graphics card running much hotter than necessary, and prevent the cooler from doing its job, as well as seeing its fans spin up to higher speeds. Using high-performance thermal paste and thermal pads can dramatically cut temperatures, and as long as you feel comfortable with dismantling your graphics card, it’s relatively easy to apply them too.

At Custom PC, we’ve been modding PC hardware since 2003, giving us loads of experience in the art of customizing your system to make it your own. We know exactly what tools you need and which methods work best.

1. Google PCB photos

Replace GPU thermal paste

Identify the areas of your graphics card that are cooled with thermal pads before you start, so you can order enough pads of the right size to replace the stock ones. Google for your make and model of graphics card to see if someone else has dismantled it. The EK cooling configurator sometimes has PCB images too.

2. Order correct thermal pads

GPU thermal pads

If the first step proves unsuccessful, proceed to step 6 and dismantle your card, so you can buy enough thermal pads – we recommend the Gelid thermal pads we’re using here. These pads come in a variety of sizes and thicknesses, so you’ll need to match the ones used on your card.

3. Use liquid metal paste

Thermal Grizzly Conductonaut liquid metal paste

We’ll be using Thermal Grizzly Conductonaut liquid metal paste in order to get the best performance, but you can also use standard paste that’s non-conductive. The former can offer lower temperatures, but you’ll need to carry out the steps below to ensure it’s safe.

4. Inspect GPU area

Replace GPU thermal paste

Check the area around the GPU core in the image of your graphics card’s PCB. This is likely to have exposed components, in which case they’ll need to be insulated if you use liquid metal paste, as this paste can run when it gets hot. Again, if you can’t find photos, you’ll need to dismantle your card first.

5. Test graphics card

Load GPU with Unigine Valley

To see the results, run an intensive benchmark, such as Unigine Valley, to load your card, with GPU-Z recording the temperature of the GPU core and memory after ten minutes. Set a fixed fan speed such as 50 percent using MSI Afterburner, so you can stop automatic fan control from skewing the results.

6. Remove screws

Dismantle graphics card

Remove the screws on the graphics card’s rear side to begin dismantling it. Use a small pot to contain them, as they’ll be easily lost. You’ll very probably need a micro screwdriver to deal with some of them.

7. Detach cables

Remove graphics card power cables

Once all the screws have been removed, detach any power and lighting cables you can see on your card. Most of them should be accessible now, but some may have to wait until you lift the heatsink.

8. Use a hairdryer

Use a hairdryer to loosen thermal paste

If the heatsink proves tricky to remove, it can help to use a hairdryer from a foot away on a high heat and fan setting. This warms the card, and in turn warms the thermal paste and pads, making it easier to remove the heatsink.

9. Lift away heatsink

Remove graphics card cooler

Go ahead and lift the heatsink away from the PCB, but do it gently and watch out for any cables that need to be detached.

10. Detach slot bracket

Remove graphics card expansion slot bracket

You may need to remove the expansion slot bracket at the end of the card in order to fully dismantle it. This is easy to do, as the bracket will only be held in place by a few screws.

11. Remove thermal pads

Remove graphics card thermal pads

With the key parts separated, remove any thermal pads that are located on the VRMs and memory chips, taking note of any size differences, so you can replace them with pads of the same size and thickness.

12. Clean surfaces

Remove thermal paste from graphics card

With the pads removed, use thermal paste cleaner or isopropyl alcohol, plus a microfibre cloth, to clean the surfaces of the GPU core, memory and heatsink. Pads can leave behind a residue, so be sure to clean the areas that were underneath the pads too.

13. Remove other pads

Remove thermal paste from GPU heatsink

Now inspect the heatsink and backplate. Remove any remaining thermal pads on these parts, and clean the contact areas here too. If the backplate is metal yet lacks thermal pads by default, it’s worth adding some pads above the rear of the memory modules and GPU core.

14. Air-dust heatsink

Clean graphics card heatsink

Now is a great time to clean your heatsink, as it can pick up dust and detritus over time, even if your case is well protected against it. An air duster is great for this job, but do it outside, as a lot of dust can be ejected if your card is particularly dirty.

15. Polish GPU contact

Polish GPU cooler contact plate

The part of the heatsink that makes contactt with the GPU core can often benefit from being polished if it’s become tarnished. Use a metal polish such as Autosol with a microfibre cloth to buff it to a shine, then use thermal paste cleaner to prepare it afterward.

16. Cut new pads to size

Cut thermal pads to size

Use scissors to cut the new thermal pads to size, mirroring the shapes of the original pads with the same thicknesses. Be sure to identify any small chips or other components that need pads as well.

17. Fit pads to memory and VRMs

Fit thermal pads to graphics card

Remove one side of the protective film on the thermal pads and place the pads onto the memory and VRMs. Press them in place, as this will help them stick to the surface and not move around.

18. Use nail varnish

Seal GPU with nail varnish

If you plan to use liquid metal paste, you’ll need to insulate the area around the GPU core in order to prevent short circuits should the paste run when it gets hot. Apply a thin layer of nail varnish (clear top coat) over the area immediately around the core– at least 10mm.

19. Apply liquid metal paste

Apply liquid metal paste to GPU

Now you can apply your thermal paste. You only need a very small amount – half the size of a grain of rice will be ample to cover the GPU core whether you’re using liquid metal or normal thermal paste. For more information, see our guide on how to apply thermal paste.

20. Spread paste over GPU

Spread liquid metal paste on GPU

Liquid metal paste needs to be rubbed into the GPU core using the included applicators. It will start to bind with the surface, eventually covering it. If you’re using a standard ceramic thermal paste, you can leave it to spread on its own using the pressure from the heatsink.

21. Reassemble and test graphics card

Reassembled graphics card

Finally, you can reassemble your graphics card. We found the GPU core temperature on our card fell from 75°C to 58°C under load with the new liquid metal paste applied, and the peak fan speed after five minutes was 300rpm lower than before our tweaking as well.

With your GPU now running cooler, you now just need to enjoy your cooler, quieter graphics card, and you may even find its boost clock improves in games as well.

If you want to cool your GPU even further, make sure you check out our guide on how to fit 120mm case fans to your GPU cooler. Plus, if you’re looking to buy a new graphics card, have a read through our full guide to the best graphics card, where we take you through the very best options for every budget.