Thermal Grizzly’s experimental direct-die CPU block is ‘3-4 times better’ than most—but it uses diamond sheets that cost €500 each
Thermal Grizzly showcased an experimental direct-die CPU cooling block at Computex 2026 that the company claims delivers performance improvements of “3-4 times better” compared to conventional cooling solutions. The innovative block features industrial diamond sheets—each costing €500—as the core cooling component.
In a direct-die design, the cooling block sits flush directly against the CPU’s silicon die, rather than interposing a spreader plate. According to Sasha Robey, Senior Marketing Manager at Thermal Grizzly, the diamond material requires special handling due to its properties. A specialized metal coating must be applied to the diamond surface to enable proper adhesion with liquid metal coolant, which is essential for efficient thermal transfer between the CPU and the cooling medium.
The prototype displayed at Computex targets AM5 socket processors, specifically Ryzen CPUs with dual CCDs (Core Complex Dies). This socket choice positions the solution for high-end enthusiast and workstation builds, where premium cooling performance justifies the significant material costs.
While the dramatic performance claims are noteworthy, the €500 per-diamond cost presents a substantial barrier to consumer adoption. The experimental nature of the product and its limited availability suggest Thermal Grizzly is still in the development phase, testing whether such premium materials can gain market acceptance among custom water-cooling enthusiasts willing to invest heavily in thermal performance.
The diamond-based cooling block represents an interesting engineering approach to addressing thermal limitations in high-performance computing, though its premium pricing and exotic materials may confine it to niche professional and extreme-enthusiast markets.