Jaskanwar Singh
Aspiring Novelist
Maximum PC | Geek Tested: 17 Thermal Pastes Face Off
Conclusion
On an idling overclocked processor or a stock-clocked CPU, the differences between thermal pastes is minimal—we saw a spread of less than 4C between the best and worst thermal pastes in our roundup. At high temperatures—and we should reiterate that we overclocked the processor to 3.9GHz and used a custom thermal-stress utility to put an enormous thermal load on the CPU—we saw a spread of over 12C. Margin of error is plus or minus 2C to allow for ambient air temperature, which ranged from 23.8C to 25.4C throughout the testing procedure.
Of the seventeen thermal pastes in this roundup, Tuniq’s TX-4 scored the highest. Its burn temperature was 3C cooler than Arctic Silver 5’s. Eleven pastes earn our Geek Tested & Approved badge: Tuniq TX-4 and TX-2, Shin-Etsu MicroSI X23-7783D, Prolimatek PK-1, Arctic Cooling MX-4 and MX-2, Noctual NT-H1, Xigmatek PTI-G4512, ZeroTherm ZT-100, Cooler Master ThermalFusion 400, and good old Arctic Silver 5. We’d give pride of place to Tuniq’s TX-2, Arctic Cooling’s MX-2, and Prolimatech’s PK-1, because they’re slightly cheaper than some of the other premiere thermal interface materials.
So does thermal paste matter? Yes—there’s a big difference between thermal pastes when running a CPU at full burn. There’s a big difference between a thermal interface material that’s good for overclocking and those that aren’t, but with eleven great thermal pastes to choose from, you can’t go wrong with one of them.
One final note: The true hero of this story is Arctic Silver’s ArctiClean two-step thermal remover & surface purifier. It’s nontoxic, smells like oranges, and cuts through the toughest thermal interface with ease. We’ve used it in the lab for years and it’s a lifesaver any time we need to remove thermal paste from a CPU or heatsink. We’ve yet to meet a thermal interface material it didn’t work on.