The fearless TrashBench has been testing direct die water cooling of graphics cards and suffered most of the leaky nightmares you might expect.
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*Source: [TomsHardware](https://www.tomshardware.com/pc-components/liquid-cooling/modder-pumps-liquid-directly-over-bare-gpu-silicon-via-3d-printed-block-drops-rtx-2060-super-load-temps-to-28-c-despite-initial-leaks)*