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Corsair HX1000i Shift Crystal power supply review: 1000W Platinum efficiency with an eye-catching transparent aesthetic
Built by CWT, the HX1000i Shift Crystal is a showpiece that backs its looks with real substance. Efficiency is excellent, regulation and ripple are tight, and the fanless window covers half of its rated output at room temperature. Taiwanese capacitors, a noisy hot run and a 200 mm long chassis are the compromises, while the ten-year warranty and iCUE LINK integration add genuine value.
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Corsair needs very little introduction to anyone who has built a PC over the past two decades. Founded in California in 1994 as a manufacturer of memory modules, the company has since grown into one of the largest brands in the PC component and peripheral market, with a catalog that covers cases, cooling, keyboards, mice, streaming gear, and of course, power supplies. Corsair entered the PSU market in the second half of the 2000s and built its reputation there by choosing its OEM partners carefully rather than manufacturing in-house. Channel Well Technology (CWT) has been one of the most important of these partners, producing a large portion of the RMx and HXi units over the years. The HXi series in particular has long been Corsair's high-end, digitally monitored family, positioned just below the flagship AX models.
We take a closer look at the HX1000i Shift Crystal to see if it deserves a spot in our best power supplies list. The HX1000i Shift Crystal is a bit of an odd bird, and Corsair is clearly fine with that. First shown at Computex 2026 and launching on November 12th, it combines the side-mounted connector layout of the SHIFT models with the digital HXi platform, and then wraps everything in a chassis with clear polycarbonate panels on three sides, turning the internals of the PSU into a part of the build's aesthetics. Beneath the show, the platform is built by CWT. It holds a Cybenetics Platinum certification at both 115 VAC and 230 VAC, and it is fully compliant with the ATX 3.1 and PCIe 5.1 design guides. It also integrates an iCUE LINK System Hub and Corsair's PinProtect+ per-pin current monitoring for the native 12V-2x6 connector. The 1000W model that we are reviewing today is rated to deliver its full power output continuously at ambient temperatures up to 50°C and comes with a ten-year warranty.
The HX1000i Shift Crystal ships in a very large and sturdy black cardboard box, with a large render of the unit on the front that does a good job of showing off the transparent panels and the lit fan. The model name is printed in big yellow and white letters across the bottom half, while the badges in the top right corner - ATX 3.1 with PCIe 5.1 and 12V-2x6 support, the Cybenetics certifications, and the iCUE LINK logo- tell you most of what you need to know before even opening the package.
The bundle is rather spartan for a product of this class. Inside the box, we found the AC power cord, four mounting screws, a handful of black cable ties, and a leaflet with safety and compliance information. There are no Velcro straps, no cable combs beyond those already on the cables, and no other accessories of any kind. It is not a deal breaker by any means, but a premium unit like this that is focused on aesthetics could have been a little more generous in this department.
All of the cables are fully modular and black, with individually sleeved wires and low-profile cable combs. There is a 24-pin ATX cable, two 4+4-pin EPS cables, three PCIe cables carrying four 6+2-pin connectors in total, and a native 12V-2x6 cable rated for 600W, alongside two SATA and two Molex cables with four connectors each. Eight Molex connectors on a modern 1000W unit is extremely generous, frankly more than any reasonable build will ever need. Corsair also supplies two iCUE LINK cables of different lengths and a USB cable that connects the PSU's monitoring interface to the motherboard.