2x RTX 6000 build during an extended bench test
A 1600W PSU pushed to its limit with dual GPUs and a CPU at 350W.
A Reddit user documented an extreme workstation build featuring two NVIDIA RTX 6000 GPUs and a high-end CPU, pushing a 1600W titanium PSU to its limits. During an extended bench test, the system pulled approximately 1650W at the wall, with each GPU capped at 535W and the CPU drawing its full 350W TDP. The primary goal was to test the air-cooled HX CPU cooler under maximum stress, including heat from the GPU exhaust. The cooler held up remarkably well, maintaining the CPU at around 95°C even with both GPUs running at full throttle. The user noted that the system's constraints are now power-related rather than thermal, as the PSU was within 50W of its hard cap.
The build represents a high-end workstation configuration for tasks like AI training, rendering, or scientific computing. The user emphasized safety by capping the GPUs to avoid PSU overload, but the test demonstrated that the cooling solution is adequate for sustained heavy loads. Community feedback from a previous post helped refine the setup, and the user expressed gratitude for the input. This test provides valuable real-world data on power delivery and thermal management in extreme dual-GPU builds, especially for professionals considering air cooling over liquid cooling for reliability or maintenance reasons.
- System pulled 1650W at the wall on a 1600W titanium PSU, within 50W of the hard cap.
- Both RTX 6000 GPUs were capped at 535W each, while the CPU ran at 350W.
- Air-cooled HX cooler kept CPU at 95°C under full load, even with GPU exhaust heat.
Why It Matters
This test shows air cooling can handle extreme dual-GPU loads, shifting limits to power delivery.