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After years of teasing prototypes, the Noctua thermosiphon AIO is finally heading to Computex 2026. The Austrian cooling brand dropped a cryptic “Vaporisation… enhanced” teaser on X tagged with the show hashtag, hinting that its long-awaited pump-less liquid cooler will share the spotlight with a separate Asetek-engineered conventional AIO when Taipei’s halls open on 2 June. After two reveals at Computex 2024 and 2025 that ended without a ship date, the Noctua thermosiphon AIO finally looks like it could be inches away from a real product launch.
What Is the Noctua Thermosiphon AIO and Why It Matters for Silent Builds
A thermosiphon swaps the pump every standard AIO relies on for pure physics. Inside the loop, a refrigerant boils into vapour at the hot CPU plate, rises naturally to the radiator because of the drop in density, condenses back into liquid, and flows under gravity back to the cold plate to start over. No impeller spinning at 3,000 RPM, no humming pump motor — just the fans you choose to spin on top of the radiator. For builders who chase NF-A12x25 G2 fan curves and tweak BIOS profiles to hunt down the last decibel of noise, that’s the holy grail.
The trade-off is engineering complexity. Two-phase systems are notoriously fussy about radiator orientation — the condenser has to sit above the evaporator for gravity to do its job — along with refrigerant charge volume and internal channel geometry. The Noctua thermosiphon AIO prototype solves the orientation problem by mandating a top-mount 360 mm radiator and milling V-shaped channels into the CPU block to guide condensate back to the hottest spot on the die. It’s the kind of detail that explains why Noctua has been working on this with Belgian phase-change specialists Calyos since long before the project ever appeared in public.
Noctua Thermosiphon AIO Timeline: From 240 mm Prototype to 360 mm Production Hardware
The journey of the Noctua thermosiphon AIO to Computex 2026 has been a slow drip-feed. Noctua first demoed the design in 2024 with a 240 mm radiator. By Computex 2025 it had grown to 360 mm and gained a redesigned evaporator with the V-channels mentioned above. The pre-Computex teaser dropped on 28 May 2026 with the caption “Vaporisation… enhanced,” confirming the project is still on track for at least a public showing in Taipei.
Noctua has been deliberately conservative about commitments. Company policy is that the thermosiphon won’t appear on its public roadmap until it is essentially ready to ship — and the most recent January 2026 roadmap still doesn’t list it. That’s the same engineering culture that produced the NH-D15 G2 chromax.black, and it’s the reason fans keep waiting on phase-change cooling without ever quite getting it across the finish line.
The Asetek Partnership Is the One That Actually Launches
While the Noctua thermosiphon AIO grabs the headlines, the cooler that will actually hit shelves first is the Noctua x Asetek conventional AIO. Asetek confirmed on 31 March 2026 that the cooler had cleared its Production Validation Test phase, putting it on track for a Q2 2026 launch — almost certainly tied to or immediately following Computex. It uses Asetek’s Emma G8 V2 pump platform running at a nominal 3,600 RPM with a ±300 RPM tolerance and three user-selectable speed profiles, paired with a triple-layer noise-reduction pump cover that Noctua co-engineered to attack the airborne and structure-borne vibration responsible for the tell-tale hum of pump-based coolers.
The radiator stack is classic Asetek 30 mm thickness in 240, 360, and 420 mm formats, populated with Noctua’s NF-A12x25 G2 or NF-A14x25 G2 fans depending on size — the same fans that ship with the company’s flagship air coolers. Fan control runs through a custom Asetek analog PWM controller tuned to Noctua’s preferences for long-term stability over software-driven curves. Mounting uses SecuFirm2+ with the cold plate offset to align with the hot spot of modern Intel and AMD dies, and there’s an optional 80 mm top fan that drops over the pump head to cool VRMs and memory around the socket. Pricing isn’t confirmed, but earlier Computex-era rumours pointed to around $300 for the flagship sizes.
When Can You Actually Buy a Noctua Liquid Cooler?
Computex 2026 runs from 2 to 5 June at Taipei’s Nangang Exhibition Center, and Noctua’s booth visit is already on every cooling reviewer’s schedule. Expect both products on display — the Asetek-built AIO in full retail trim with availability and pricing announcements, and the Noctua thermosiphon AIO with another round of “almost there” demonstrations. The conventional AIO should be on store shelves before the end of Q2, putting it in the same window as the rest of Noctua’s pending 2026 lineup. The thermosiphon remains a “when it’s ready” product, but the steady cadence of physical iterations strongly suggests it has moved past vapourware status.
For anyone planning a fanless or near-silent build this year, the Noctua thermosiphon AIO is worth keeping a tab open on. For everyone else, the Asetek-built cooler is the realistic option, and given Noctua’s track record with fans, it is already shaping up to be one of the quietest 360 mm AIOs available. PixelForge Network is tracking the Computex 2026 announcements as they roll in; check our Samsung 2026 Monitors Launch — Industry-First 6K Gaming Display & OLED Lineup for more of what Taipei has on the floor this year, and the official Noctua Computex 2025 announcement page for the deeper technical brief on the thermosiphon design.
— Rynx
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