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Rectangular grey phase-change thermal pad, 40 by 80 millimetres, point two millimetres thick

Corn Electronics

Corn Electronics PTM7950 40x80x.2mm Phase Change Thermal Paste 8.5W/mK

SKU CH-A632-W38S5

A 40x80x.2mm PTM7950 phase-change pad melts at 45°C to deliver 8.5W/mK conductivity with under .04°Ccm²/W impedance, surviving 150°C baking and 1000 thermal cycles for lasting GPU and CPU contact

Model 40 x 40mm

  • Phase-change material activates at 45 °C for automatic gap filling
  • 5 W/m·K conductivity moves heat efficiently from CPU or GPU
  • 40 × 80 × 0.2 mm sheet fits large dies and laptop coolers
  • Passes 150 °C bake and 1000 thermal cycles for long-term reliability
  • Thermal impedance below 0.04 °C·cm²/W reduces junction temperatures

Phase Change Thermal Pad 40x80mm

The Corn Electronics PTM7950 is a phase change thermal interface material supplied as a 40 by 80 millimetre pad with a thickness of .2 millimetres. It transitions at 45°C to fill microscopic gaps between a processor or graphics die and its cooler. Rated at 8.5 W/m.K, it targets enthusiasts who want a long lasting alternative to traditional thermal paste.

Suited for GPUs CPUs and compact devices

Builders upgrading a PS5, Steam Deck, laptop or M.2 SSD will appreciate the pad format that requires no spreading and resists pump out over time. Users who prefer a liquid metal compound for absolute peak conductivity or who need a larger sheet for custom loop cold plates should look at something else.

Sustained load behaviour

The material passes 150°C baking for 1000 hours and 1000 thermal cycles while keeping thermal impedance below .04°C cm²/W without a shim. Its polymer PCM system maintains low contact resistance through repeated heating and cooling, so thermal performance stays consistent during extended gaming or compute sessions.

How it compares

Measured against everything we stock in Thermal Paste, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 75% of the 498 comparable items (median $12.99).

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Specifications

No published specifications for this item yet.

Other versions of this model

2 more in the same range

Questions about this item

Does the 40x80mm PTM7950 pad cover my GPU die and VRAM without trimming?

The pad measures 40x80x0.2mm; compare those dimensions to your die and VRAM layout before installing.

Will the 45°C phase-change temperature activate with my older cooler that runs hotter?

The material changes phase at 45°C, so it will soften and fill gaps once the component reaches that temperature.

How do I confirm the <0.04°C·cm²/W impedance is achieved after mounting?

Monitor core temperatures under sustained load; a drop to expected thermal levels indicates the pad has wetted the surfaces correctly.

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