A Modder 3D-Printed a Direct-to-Die GPU Cooling Block and Dropped an RTX 2060 Super to 28C

The Experiment

PC modder TrashBench asked a simple question: why cool a GPU through a heatsink at all? Why not pump water directly over the bare silicon die? The answer turned out to be more complicated than expected, but the final result was striking.

The project started with a 3D-printed cooling block designed to sit flush against the GPU die, replacing the stock cooler entirely. Water pipe fittings were melted into the block. Washers, gaskets, and hose clamps handled the sealing. The first prototype leaked.

Solving the Leaks

TrashBench solved the initial leaks with epoxy adhesive, bonding the 3D-printed block directly to the GPU. More epoxy went onto the tube fittings after water seeped from those joints as well. The second prototype held. A GTX 980 test run proved the concept before moving to the main target: an RTX 2060 Super.

Material choice mattered. Not all 3D printing filaments are waterproof. Some leaked from the edges under pressure. Others were slightly porous, allowing seepage over time. The Bambu Lab printer used for the final prints had to run with a material that could handle sustained contact with coolant.

A PCIe riser cable kept the motherboard safe during early live power tests. Any leak would drip onto the riser rather than directly onto the board.

The Results

The temperature numbers tell the story. Under load, the stock RTX 2060 Super cooler hit 70C. A conventional AIO liquid cooler brought that down to 36C. The 3D-printed direct-to-die block hit 28C. That is a 42C reduction over stock cooling, using a block that cost a few dollars in plastic and a tube of epoxy.

This is not a practical cooling solution for daily use. The block requires custom fitting for each GPU model. The epoxy bond is permanent. Any die replacement means destroying the block. But as a proof of concept, it demonstrates what is possible when you combine 3D printing with liquid cooling.

What It Means for 3D Printing

The project highlights an underappreciated use case for consumer 3D printers: custom thermal management hardware. Heatsink brackets, fan shrouds, and mounting adapters are all candidates for in-house design. When an off-the-shelf part does not fit, printing a custom solution is faster than waiting for a manufacturer to release one.

TrashBench used a Bambu Lab printer for the final working block. That detail matters: the printer's ability to produce watertight parts in suitable materials made the project feasible. Not every FDM printer can do that reliably.