Unconventional GPU Placement Yields Significant Cooling Gains, Modder Finds
A PC enthusiast's experiments with repositioning graphics cards and cooling components inside the case chassis reveal that decades of standard building practices may not be optimal for thermal performance.
Challenging established conventions in personal computer assembly, content creator TrashBench has demonstrated that rethinking component placement can deliver meaningful improvements in cooling efficiency. His latest project achieved a 14-degree reduction in GPU hotspot temperatures while simultaneously lowering CPU temperatures by 3.3 degrees—a result that contradicts the assumption that PC design standards have been perfected through decades of refinement.
TrashBench's methodology involved taking an RTX 3080 system and, as he put it, "test it normally, then start moving s*** around." The baseline configuration featured conventional components: a 360mm all-in-one liquid cooler for the processor and the three-fan RTX 3080 positioned in its standard PCIe expansion slot. Using 3DMark Time Spy and 7-Zip benchmarks with locked fan speeds, he established a thermal baseline before experimenting with alternative arrangements.
The experimentation phase involved systematic repositioning of the graphics card throughout the case interior. The GPU was tested at the bottom of the chassis, mounted vertically against the side panel in different orientations, and positioned relative to the case's triple intake fans. Simultaneously, the CPU's all-in-one cooler radiator was tested in both intake and exhaust configurations.
While individual configurations tended to favor either GPU or CPU cooling in isolation, TrashBench sought a balanced approach that would benefit both components. His final configuration mounted the CPU vertically against the side intake fans, with the all-in-one cooler radiator operating in a traditional exhaust setup. This arrangement delivered the observed thermal improvements: a 14-degree reduction in GPU hotspot temperature paired with a 3.3-degree CPU temperature decrease.
For those interested in replicating this type of experimentation, TrashBench's work demonstrates the necessity of PCIe riser cables, which he employed in various lengths to position the graphics card away from its standard slot location.