Arctic launches MX-7, its best-performing thermal paste to date

Shawn Knight

Posts: 15,838   +202
Staff member
Bottom line: Arctic has introduced a new version of its industry-leading thermal paste. According to the company, MX-7 features a new formula with even lower thermal resistance that should deliver a noticeable performance increase over its predecessor.

Arctic MX-7 is non-capacitive and electrically non-conductive, making it safe to use across a variety of applications including GPUs, GPUs, and even in game consoles. Arctic says the paste is a bit smoother than MX-6, but not quite as liquid as MX-4. Its high cohesion is said to ensure long-lasting performance without drying out.

In the company's internal testing, MX-7 lowered temps on a Core Ultra 9 285K clocked at 4.5 GHz by 2.3 degrees Celsius over MX-6 and was 4.1 C cooler than MX-4. Your results will likely vary but if applied properly, you should see a boost in performance over stock TIM.

Speaking of installation, Arctic recommends applying the paste in a simple cross pattern then mounting your heatsink. When mounted, the cooler will distribute the thermal material evenly across the entire contact surface without air pockets – even on coolers with direct-touch heatpipes.

Due to its texture, the paste cannot be spread using a spatula, we're told.

If you are looking for a quick and easy way to lower temperatures by a few degrees, a quality thermal paste should be one of the first products you reach for. Removing old paste and applying a fresh layer is not a difficult task, and who knows – you may even be able to dial back fan speeds for quieter operation or free up some additional headroom for overclocking. Combined with proper airflow in your case and perhaps an upgraded fan, it's an easy way to lower temps.

MX-7 is available now in 2g, 4g, or 8g tubes and can be bundled with Arctic's MX Cleaner, which is used to remove old paste and prep the contact surface. The 8g tube is currently listed for $8.59 over on Amazon, while the 4g kit with MX Cleaner is priced at $9.59.

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At this point, I'm way more interested in longevity than absolute performance.

With longer upgrade cycles, it's more important to eke out an extra several years over 1 degree C.
Agreed. With the way prices are going, im not upgrading my 13700k DDR5 system for another 3-4 years. Do we still have to reapply thermal paste every few years?
 
At this point, I'm way more interested in longevity than absolute performance.

With longer upgrade cycles, it's more important to eke out an extra several years over 1 degree C.
Agreed. With the way prices are going, im not upgrading my 13700k DDR5 system for another 3-4 years. Do we still have to reapply thermal paste every few years?
I would look into PTM7950.
Using it with my rig right now (new build just before RAM skyrocketed). Should have great performance and even better longevity. It's just a bit of a pain to apply (as it's a thin sheet, but cooling it down helps as it's a phase-changing material). Just make sure you find the real stuff.
 
I would look into PTM7950.
Using it with my rig right now (new build just before RAM skyrocketed). Should have great performance and even better longevity. It's just a bit of a pain to apply (as it's a thin sheet, but cooling it down helps as it's a phase-changing material). Just make sure you find the real stuff.
I've used this to repaste my laptop. It's not materially tougher than thermal paste.
 
I have had my mx4? Since forever. And it still works great. I serviced every laptop and PC of my relatives with that single tube and feel confident to keep using it past 7 years.
 
2,6 g/cm³, 11,8 W/mK, 190 Pa·s - Thermal Grizzly Hydronaut
3,7 g/cm³, 12,5 W/mK, 170 Pa·s - Thermal Grizzly Kryonaut
2,5 g/cm³, 8,5 W/mK, 870 Pa·s - Arctic MX-4
2,6 g/cm³, 7,5 W/mK, 45000 Pa·s - Arctic MX-6
2.9 g/cm³, ??? W/mK, 35000 Pa·s - Arctic MX-7

Used the first one for 4 year without issue with Fractal Design Celsius S360.
It may or may not be working longer, but I had to re-apply it when upgraded CPU.
 
2,6 g/cm³, 11,8 W/mK, 190 Pa·s - Thermal Grizzly Hydronaut
3,7 g/cm³, 12,5 W/mK, 170 Pa·s - Thermal Grizzly Kryonaut
2,5 g/cm³, 8,5 W/mK, 870 Pa·s - Arctic MX-4
2,6 g/cm³, 7,5 W/mK, 45000 Pa·s - Arctic MX-6
2.9 g/cm³, ??? W/mK, 35000 Pa·s - Arctic MX-7

Used the first one for 4 year without issue with Fractal Design Celsius S360.
It may or may not be working longer, but I had to re-apply it when upgraded CPU.
The Thermal Grizzly ones are usually recommended to be changes every 1-3 years. (I change Kryonaut every 1-2 years). I do have MX4 for less important systems where I would apply it once and never opened it again.
 
You guys are speaking my language with longevity being at least as important as performance. Ease of removal is important, too. I used MX-6 on the last one, but looked long at that MX-4 8 year thing.

How long is this MX-7 rated for?
And how long is PTM7950 good for?
 
You guys are speaking my language with longevity being at least as important as performance. Ease of removal is important, too. I used MX-6 on the last one, but looked long at that MX-4 8 year thing.

How long is this MX-7 rated for?
And how long is PTM7950 good for?

Yes, longevity. The only TP I recall seeing that clearly displayed is the long lived Arctic Silver. Been around for as long as I can remember.

It states lasts up to 8 years.

Not that I use it (well once), I just re-do CPUs about every 18 months.
 
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