Modder turns Intel i9-14900KS CPU IHS into a direct-die water block

This modder has taken direct-die cooling to a new level

A Chinese modder has taken direct-die CPU cooling to the next level by turning the integrated heatspreader (IHS) of an Intel i9-14900KS CPU into a direct-die CPU water block. This mod was spotted by @Unikoshardware on Twitter/X, revealing this custom CPU cooler design to the world.

Instead of replacing Intel’s stock IHS with a direct-die CPU water block, this modder turned their CPU’s IHS into a water block. This was achieved using a CNC machine, which carved grooves into the ISH. A custom gasket and cover plate were also created, making the new water block watertight.

This custom Intel IHS water block is more (and less) effective than a standard CPU water block

When tested, this custom water block was found to deliver better cooling performance than a standard CPU water block. This is because there is less distance between this CPU (the heat source) and its coolant. However, lowering the speed of their pump saw temperatures rise at a faster rate than a standard water block. This resulted in a standard water block delivering better thermals when pump speeds are lowered.

Clearly, this custom water block design isn’t as optimised as purpose-built CPU water blocks, increasing flow resistance. That said, there is no reason why a more “optimised” CPU IHS water block design couldn’t be built in the future.

While this custom liquid cooling solution is fascinating, it likely wouldn’t be a viable water block long-term. I’m sure Intel didn’t create their CPU IHS with water cooling in mind. Furthermore, it is worth noting that this IHS has had material removed by a CNC machine, removing its protective surface. This makes corrosion seem like a likely problem if this block is used long-term. Regardless, it is awesome to see PC enthusiasts try out something new and unique.

You can join the discussion on the modder who turned their CPU heatspreader into a water block on the OC3D Forums.