Thermal Grizzly has released the PhaseSheet PTM Pro, an upgraded phase-change thermal pad with improved thermal conductivity and a redesigned carrier film for easier, cleaner installation on CPUs and GPUs.
Thermal Grizzly has introduced the PhaseSheet PTM Pro, the latest version of its phase-change thermal interface material, now with improved thermal conductivity and a new carrier film designed for easier handling. According to Tom's Hardware, the redesigned film peels away more easily from both sides of the sheet, reducing the risk of tearing during installation — a notable improvement for builders who have found earlier phase-change sheets fiddly to work with.
Like its predecessor, the PhaseSheet PTM Pro is solid at room temperature and only begins to liquefy above 45°C, behaving like a thermal paste once a system is under load. Thermal Grizzly notes that this phase-change behavior helps counteract the pump-out effect, where repeated heating and cooling cycles — especially between materials like copper and silicon that expand at different rates — gradually displace standard thermal paste over time. Because the material contracts again as it solidifies, the company says this mitigates that long-term displacement.
In its own testing, as reported by KitGuru, Thermal Grizzly measured a temperature delta of 5.83°C for the PTM Pro, compared to 6.36°C for the original PhaseSheet PTM, 6.13°C for KryoSheet, and 6.87°C for Kryonaut Extreme paste. The material is electrically non-conductive, making it suitable for direct use on bare-die CPUs and GPUs. The PhaseSheet PTM Pro is available now in a 40x40 mm size for $23.28 directly from Thermal Grizzly.
What We Know
| Spec | Detail |
|---|---|
| Type | Phase-change material (PCM) thermal sheet |
| Size Available | 40x40 mm |
| Price | $23.28 (€19.90) |
| Liquefaction Point | Above 45°C |
| Electrical Conductivity | Non-conductive |
| Recommended Mounting Force | ~300-400 N |
| Thermal Delta (TG testing) | 5.83°C |
| Primary Use | Processors and graphics chips |
Frequently Asked Questions
What is the PhaseSheet PTM Pro made of?
It's a phase-change material (PCM) thermal sheet that is solid at room temperature and liquefies during operation to dissipate heat like a thermal paste.
At what temperature does the PhaseSheet PTM Pro liquefy?
It begins to liquefy at temperatures above 45°C, according to Thermal Grizzly.
How does it compare to the original PhaseSheet PTM?
In Thermal Grizzly's own testing, the PTM Pro achieved a temperature delta of 5.83°C versus 6.36°C for the original PhaseSheet PTM, indicating improved thermal performance.
What size and price is available?
It's currently available in a 40x40 mm size for $23.28 (€19.90) directly from Thermal Grizzly.
