AMD Ryzen Threadripper Pro 9995WX HEDT processor with 96 cores and 192 threads comes with a default TDP of 350 W. However, heavy overclocking can bring the CPU to 1,300 W and requires a custom integrated heat spreader (IHS) that serves as a direct-die waterblock. In the latest endeavor by Geekerwan, the enthusiast created a custom fin structure inside the Ryzen Threadripper Pro 9995WX IHS that serves as a direct-die waterblock to achieve an impressive overclock of 5.325 GHz, drawing an astonishing 1,340 W during load, with the entire system drawing around 1,700 W. According to Geekerwan, he contacted ASUS China regional manager Tony Yu to experiment with different IHS designs before "ruining" the IHS of a $12,000 HEDT CPU. He then proceeded with trying a straight fin structure common in commercial waterblocks, but also conducted computer simulations that showed a curved, wavy S-shaped fin structure is the most efficient in capturing heat, as the coolant flows over a longer distance with minimal obstruction, resulting in 20% better cooling than the straight fin structure.

The IHS of the AMD Ryzen Threadripper Pro 9995WX processor is 4.1 mm thick, which left Geekerwan with about 2.0 mm of fin depth and about 2.1 mm for the structural integrity of the IHS, which is subject to a lot of water pressure. After a heavy 19-hour session of CNC milling, the result is a CPU that ran between 30-50°C, which is an amazing temperature under Cinebench 2026 load. The system also placed 7th in Cinebench R23, just behind an LN2-cooled AMD Ryzen Threadripper Pro 7995WX running at 6.2 GHz. Impressive heat dissipation and the massive 5.325 GHz clock on a 96-core system are also made possible with an industrial chiller, two Bosch water pumps from cars, and a 37-gallon water tank. You can check out the entire process below.