Skip to main content
PTM7950 40x80x0.25mm Phase Change GPU Thermal Pad, JOYJOM High Conductive Silicone Grease 8.5W/mK CPU Thermal Paste for PS5 Steam Deck CPU GPU SSD M.2 Laptop
JOYJOM

JOYJOM PTM7950 40x80x0.25mm Phase Change GPU Thermal Pad

Bottom line: The JOYJOM PTM7950 40x80x0.25mm Phase Change GPU Thermal Pad ($14.39 on Amazon as of 2026-10-06): Phase change at 45°C fills die-to-heatsink gaps like paste, without the mess; main trade-off: only 0.25mm thick, so it can't replace thick VRAM or memory pads.

$14.39

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Buy on Amazon — $14.39 Compare to similar retro cpu coolers & fans

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Phase change at 45°C fills die-to-heatsink gaps like paste, without the mess
  • ✓ Rated 8.5 W/mK with thermal impedance under 0.04°C·cm²/W (no shim)
  • ✓ Listed 1,000-hour 150°C bake and 1,000-cycle test resists pump-out
  • ✓ 40x80mm sheet can be cut to cover a CPU and GPU die in one laptop
  • ✓ Includes screwdriver, spatula, brush, wipe and gloves for a full repaste

Cons

  • ✗ Only 0.25mm thick, so it can't replace thick VRAM or memory pads
  • ✗ Needs a first warm-up past 45°C before it reaches full contact
  • ✗ Cutting to size and peeling the protective films takes patience
  • ✗ Listing calls it silicone grease and paste, which is confusing for a pad

Manufacturer description

The JOYJOM PTM7950 phase change thermal pad is for builders and repairers who want a thermal interface that holds up longer than conventional paste. The 40x80x0.25mm sheet stays solid at room temperature. It softens at 45°C and flows into the microscopic gaps between the die and the heatsink. The listing rates its thermal conductivity at 8.5 W/mK and its thermal impedance below 0.04°C·cm²/W with no shim. The listing cites reliability testing of 1,000 hours of baking at 150°C and 1,000 thermal cycles. That's why PTM7950 is popular for repasting handhelds and consoles, where a pump-out-prone…

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored JOYJOM PTM7950 40x80x0.25mm Phase Change GPU Thermal Pad using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. JOYJOM's retro cpu coolers & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro cpu coolers & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Is the JOYJOM PTM7950 a thermal paste or a thermal pad?

It is a 40x80x0.25mm phase change pad. It ships as a solid sheet, softens at 45°C and then flows like paste to fill surface gaps. The listing title mentions thermal paste, but the product is the pad sheet.

Will the PTM7950 work in a Steam Deck or PS5?

The listing names the PS5 and Steam Deck as target devices, along with laptop CPUs and GPUs and M.2 SSDs. At 0.25mm thick, it is meant to go directly between the die and the heatsink, not in spots that need thick pads.

How long does PTM7950 last compared to regular thermal paste?

The listing cites a 1,000-hour bake test at 150°C and 1,000 thermal cycles with stable performance. Phase change material is chosen mainly because it resists the pump-out that dries out conventional paste over time.

Do I need to do anything special after installing it?

The pad reaches full contact once the chip heats past its 45°C phase change point. Running a normal gaming or stress load for a short session lets the material soften and settle into the gap.

What comes in the box with the JOYJOM PTM7950?

You get one 40x80x0.25mm thermal pad, a Phillips screwdriver, a spatula, a cleaning wipe, a cleaning brush and finger gloves.

Key Features

  • PTM7950 is a highly thermally conductive Phase Change Material (PCM) that lasts longer and is more effective than tradiational thermal paste.
  • Size 40x80x0.25mm, Phase change at 45°C, Thermal Conductivity: 8.5 W/m.K,
  • PTM7950 is a proprietary material that provides superior reliability (pass 150˚C baking 1000 hours, T/C-B 1000 cycles) and maintains low thermal impedance (<0.04˚Ccm2/W @ no shim), making the PTM7950 series desirable for high performance integrated circuit devices.
  • PTM7950, based on a novel polymer PCM system, exhibits excellent interface wetability during typical operating temperature ranges, resulting in extremely low surface contact resistance.
  • Package include: 1x Thermal Pad 40x80x0.25mm, 1x Phillips Screwdriver, 1x Cleaning Wipe, 1x Spatula, Finger gloves, 1x Cleaning Brush

Full Specifications

BrandJOYJOM
Dimensions40x80x0.25mm
CompatibilityPS5
Package include1x Thermal Pad 40x80x0.25mm, 1x Phillips Screwdriver, 1x Cleaning Wipe, 1x Spatula, Finger gloves, 1x Cleaning Brush
Package Dimensions6.02 x 4.13 x 1.14 inches
Full listing titlePTM7950 40x80x0.25mm Phase Change GPU Thermal Pad, JOYJOM High Conductive Silicone Grease 8.5W/mK CPU Thermal Paste for PS5 Steam Deck CPU GPU SSD M.2 Laptop

Ready to buy?

PTM7950 40x80x0.25mm Phase Change GPU Thermal Pad, JOYJOM High Conductive Silicone Grease 8.5W/mK CPU Thermal Paste for PS5 Steam Deck CPU GPU SSD M.2 Laptop is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $14.39

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Related Retro CPU Coolers & Fans

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
PTM7950 40x80x0.25mm Phase Change GPU Thermal Pad, JOYJOM High Conductive Silicone Grease 8.5W/mK CPU Thermal Paste for PS5 Steam Deck CPU GPU SSD M.2 Laptop
$14.39
View on Amazon →