Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Brand	Honeywell
Model Number	PTM7950SP
Material Type	Phase Change Material
Thermal Conductivity	8.5 W/m-K
Operating Temperature Range	-40°C to 125°C
Application Method	Pre-cut Sheet or Paste Application
Compatibility	CPUs, GPUs, Laptops, Desktops
Package Contents	1g Syringe and Applicator Tool
Shelf Life	24 Months from Manufacture Date
Country of Origin	USA

6 reviews

Anonymous

Mar 25, 2026

Rating: 5/5

Industrial grade quality

We use this in our rendering farm workstations. The consistency is perfect, and it handles the high heat cycles of professional GPUs without drying out. Highly recommended for heavy usage scenarios.

Anonymous

Mar 23, 2026

Rating: 4/5

Great performance, tricky application

The cooling results are fantastic, but applying the sheet version requires precision to avoid air gaps. The syringe version included in this kit was much easier to work with for my GPU repaste.

Anonymous

Mar 17, 2026

Rating: 5/5

Superior longevity

Unlike liquid metal or standard grease that pumps out over time, this PCM maintains its performance. I've had it on my desktop CPU for six months with zero degradation in cooling efficiency.

Anonymous

Mar 16, 2026

Rating: 4/5

Solid choice for enthusiasts

Very close to liquid metal performance without the electrical conductivity risk. It takes a few heat cycles to fully soften and reach peak performance, so don't judge it immediately after installation.

Anonymous

Mar 09, 2026

Rating: 5/5

Saved my overheating notebook

My old business laptop was throttling constantly. After cleaning the heatsink and applying PTM7950SP, it runs cool and quiet again. The phase change technology really works as advertised.

Anonymous

Mar 08, 2026

Rating: 5/5

Best thermal solution for laptops

I replaced the stock paste on my gaming laptop with this phase change material, and temperatures dropped by 8 degrees Celsius under load. It stays solid at room temperature which makes cleanup incredibly easy compared to traditional pastes.

5 FAQ

Q: Can this be used directly on a bare CPU die without a heatsink?

A: No, this thermal interface material must be sandwiched between the CPU/GPU die and a heatsink or cooler to function correctly. It requires pressure and heat to activate the phase change.

Q: Does this need to be reapplied every year?

A: No, one of the main benefits of phase change materials is their longevity. Under normal operating conditions, reapplication is typically not needed for several years.

Q: Is this product electrically conductive?

A: No, Honeywell PTM7950SP is non-electrically conductive, making it safe to use around sensitive motherboard components unlike liquid metal solutions.

Q: How do I apply this if I have an irregularly shaped GPU die?

A: For irregular dies, we recommend using the syringe form factor included in the package. Apply a thin, even layer across the surface rather than using the pre-cut sheets.

Q: What is the difference between PTM7950SP and PTM7958SP?

A: Both are high-performance phase change materials. The 7958SP generally offers slightly higher thermal conductivity and is often preferred for extreme overclocking, while 7950SP is the industry standard for general high-performance computing.

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