The Moment of Truth… - Next Gen ULTIMATE Desk PC Part 3
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The video continues the epic Next Gen ULTIMATE Desk PC saga with Part 3, focusing on finalizing the reservoir and reworking the water cooling loop for a ultra-thin desk PC. The hosts reveal that the reservoir design has shifted from a three-piece to a four-piece configuration, with an emphasis on preventing brittleness while still achieving a reliable seal. They test new alpha chips and discuss the challenges of drilling and tapping G1/4 holes, the increased port count, and the importance of maintaining a leak-free seal when handling acrylic parts. The build sequence moves from design tweaks to hands-on assembly, where the team tackles hose routing, fitting placement, and the problematic GPU block orientation due to an unusual NVIDIA reference PCB. They experiment with right-angle fittings and consider alternative approaches to keep the water cooling lines clean and serviceable, weighing aesthetics against practicality. The moment of truth arrives as they pressurize and test the completed loop, encountering leaks that require thicker O-rings and careful re-seating of components. Through trial and error, the crew diagnoses uneven acrylic thickness and the need for better O-ring compression, then achieves a pressurized but stable system, validating that the loop can actually hold water. With the system finally circulating coolant, the temps look reasonable for idle operation, and the team imagines painting and cable-modding the build for a finished, show-ready PC desk. The video closes by teasing further refinements, cable management, and a future desk upgrade while reinforcing the entertainment value of watching a complex custom build come to life.
Topics · hardware · technology · computing · custom_pc · water_cooling
Questions answered
- What is the new four piece reservoir design intended to improve, and what was the key challenge during the redesign?
- The four piece reservoir design aims to improve seal reliability and reduce brittleness compared to the prior three piece version. The main challenge during redesign was achieving a reliable o‑ring seal across more joints, which complicated assembly and required attention to hole tapping and fixture alignment.
- Why did the team reconsider the hard line fittings, and what solution did they settle on for routing the coolant tubes?
- They found the hard line fittings to be junky and difficult to route cleanly around tight clearances. They shifted toward using more flexible hose sections and strategic 90-degree turns to manage space, while keeping the overall appearance tidy and ensuring the tubing could be installed and serviced without excessive bending.
- What ultimately confirmed that the cooling loop could be pressurized and hold water during testing?
- After locating and replacing thicker O-rings and ensuring even compression, the team depressurized the system, refilled it, and observed successful circulation with no persistent leaks, confirming the loop could be pressurized and hold water.