Corsair power supplies have a fantastic reputation in the community for being reliable and efficient choices that are favored by many enthusiasts, and are generally quite reasonable in terms of price. If you’re building a high-power rig or want to upgrade your existing PSU with a little more headroom, I may have found the deal for you. On eBay at the moment, this refurbished RM850x model is down to £76 thanks to SCARY SAVINGS20 code that has been executed in recent days. You’ll need to be quick, as this is the last day this code will be available.

Before we go any further, it’s worth explaining that this is a manufacturer-refurbished device that has been professionally checked, cleaned, and refurbished by Corsair itself. It is also in new condition and comes with a one-year warranty. That’s the only big difference between these certified refurbished units and those retailing at full price, which have a much longer ten-year warranty. If you’d rather opt for a new retail option for added peace of mind, the best price we can find at the time of writing is £110 from Scan Computers.

This is a reliable 80+ Gold rated unit, which is a testament to its efficiency and also provides peace of mind. Inside, this RM850x is equipped with a 135mm magnetic lift fan with custom-designed rotors for a premium choice with low noise and excellent reliability, which is solid. The fact that it is also a fully modular PSU also makes cable management easier and allows for better airflow. Building a PC without a modular power supply can be a bit of a pain, given that you’ll need to find a place to store all the loose cables you don’t use, so a fully modular option keeps things practical. Its dimensions of 150 x 140 x 86 mm are also conventional for ATX power supplies, which gives you a lot in terms of compatibility to insert it into a variety of systems.

A power of 850 W is enough to power even some fairly beefy systems. This is the recommended power for most of the more “standard” RTX 4090 offerings, barring some overclocked models, while anything below from Nvidia and AMD will be more than sufficient. For the RX 7900 XTX, the recommendation is a minimum of 750W, while 850W gives you a bit of headroom. If this is also further proof, Corsair’s RMx PSUs are rated A-tier in the market. Cultist PSU Tier List (formerly of LTT Forums).

If you’re looking for a high-powered PSU for a beefy gaming PC, being able to get this refurbished Corsair RM850x 850W unit for just £76 from Amazon is excellent.