Building a custom desktop just reached a new level of complexity with the Thermaltake CAPO X, a full tower PC case engineered to house two completely independent computer systems within a single enclosure. Recent testing of this unique dual-system chassis put its thermal limits to the test, packing an AMD Ryzen 7 9800X3D paired with a Radeon RX 9070 XT in one compartment, alongside an Intel Core Ultra 7 265K paired with a GeForce RTX 5070 Ti in the other. Both configurations successfully maintained stable temperatures during simultaneous workloads, though the hardware arrangement introduced distinct thermal interactions between the two builds.
During demanding benchmark evaluations using Cinebench and 3DMark Steel Nomad Stress Test, the individual components performed as expected under sustained loads. When operating independently, the upper AMD system's processor and graphics card generally hovered around 60 degrees Celsius. In the lower compartment, the GeForce RTX 5070 Ti also reached roughly 60 degrees Celsius, while the Core Ultra 7 processor stayed closer to 50 degrees Celsius. However, running both computers concurrently triggered a noticeable shift in upper-system temperatures, causing them to climb by approximately 5 degrees Celsius compared to standalone operation.
Reviewers traced this thermal variance to the lower Intel system, noting that rising heat visibly influenced the airflow passing through the upper chamber. While the stacked architecture successfully avoids critical overheating, the findings emphasize that builders must carefully manage internal fan speeds, placement, and exhaust setups to mitigate heat transfer. Furthermore, assembling a dual-system rig inside the CAPO X demands significantly more effort than a standard chassis. Managing independent motherboards, storage components, and power configurations requires meticulous cable routing, and the absence of an included fan hub means builders will likely need to invest in a separate controller to streamline multiple fan connections across both environments.
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