CORSAIR RM1200e (2023) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Platinum Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black

Fully modular design — clean build, fewer cables, and tidy cable routing80 Plus Gold / Cybenetics Gold efficiency — meaning lower heat and power wasteSemi-silent 120 mm rifle-bearing fan with zero‑RPM mode under low loads — great balance of cool and quietCompact ATX 3.1 form factor (~140 mm deep) — fits snugly in most mid-tower casesSolid protection suite + 7–10 year warranty — backing Corsair’s reliability claimsThe RM850e is a powerful, efficient, and very capable PSU, ideal for modern builds with high-power components.

Works great, looks great. Easy to install, and provides more than enough power (according to your own setup of course). Noise is minimal, its not louder than any modern graphics card; you'll hear the GPU before the PSU. It does give a very loud thump when it turns off, but other than that, perfect piece of hardware. Always bought Corsair, never disappointed. Cabling takes a sec, but being able to mix and match allows for excellent cable management.

This is one of the best power supplies I’ve used. Fully modular design makes cable management a breeze, and it powers my high-performance build with no issues. Runs silently, even under heavy load. Corsair’s quality is unmatched, and this unit proves it. Highly recommended for serious builds.

The Corsair RM750e (2023) Fully Modular Low-Noise Power Supply is one of the best PSU upgrades I’ve made for my build. It delivers clean, consistent power with impressive efficiency thanks to its 80 PLUS Gold certification. I’m running a high-performance gaming PC, and this PSU handles it effortlessly, even under heavy loads.The fully modular design is a lifesaver for cable management—no more unnecessary cables cluttering up my case! It made installation quick and stress-free. Another standout feature is how quiet it is. Even during intense gaming sessions, the fan barely makes a sound, keeping my setup whisper-quiet.Corsair’s build quality shines here, with premium materials and reliable components. The 750W capacity is perfect for future-proofing, and knowing Corsair includes a long warranty adds peace of mind. If you’re looking for a high-quality, efficient, and quiet PSU, the RM750e is a fantastic choice.

I'm a PC builder and I can say, I plugged this in and my system came right up. I got the 1000w one because of the graphics card. If you have a high-end gamer graphics card that can do VR, then get at least the 1000watter. If you're running a basic system, you don't need as much power. I pretty much leave my system running 24/7 and it goes in to low power mode. So far, no problems. Great power supply for system builders. Came with all the cables.

Oddly powerful enough to run an RTX 3090 and RTX 3070 together with a Ryzen 7 9700X CPU and ~12 other parts. I probably should have gotten the 1000W model instead, but I'm dumb and didn't plan ahead. Included all mentioned cables and a few other things.There are not enough included cables for both my GPUs, so I had to borrow a dual 6+2 cable from an RM750e 2019 model. Thankfully, all RMe series PSUs back to at least 2019 have full cable compatibility. Corsair has a helpful table on their website for which PSUs have compatible cables.

It's worked well and it is a very good wattage for very good price. It gets pretty hot but the built-in fan works pretty well. It isn't that noisy either.

I’ve been building PCs for over a decade, and this is easily one of the most impressive power supplies I’ve used to date. I picked up the CORSAIR RM850e (2025 revision) as part of a rebuild centered around an Intel i9-12900KS and RTX 3090, and I’ve been nothing but impressed so far.Build Quality & Design:The unit itself is solid — heavy in a reassuring way, with a clean black finish and no unnecessary branding or flashy extras. The fully modular design is a huge plus, especially for managing cables in a tight mid-tower. I appreciated that the included cables were all black and flat — easy to route behind the motherboard tray, and they look clean without custom sleeving.Installation & Cabling:Installation was simple, and everything fit snugly. I’m using the standard 3x 8-pin for the 3090, but it’s nice knowing the 12V-2x6 cable is included in case I upgrade to a future PCIe 5.1 card later on. No loose connectors, no weird bends required — and unlike some modular PSUs I’ve dealt with, the ports on the unit are clearly labeled and firmly seated.Performance & Stability:Despite powering a very power-hungry setup, this PSU hasn’t flinched once. The 12900KS, even under boost/load, can be a voltage-hungry CPU, especially paired with the 3090 — but even during max load stress testing (Cinebench + Heaven benchmark running together), rails stayed completely stable, no crashes or brownouts, and no sign of power-related instability.Noise & Efficiency:Corsair nailed the noise levels. During idle and light gaming, the fan doesn't even spin up. Even when it does under load, it’s so quiet it fades into the background of my other case fans. My case has good airflow, but the fan curve on this PSU is genuinely impressive. It’s also Cybenetics Gold rated, and the system draws power very efficiently — I've been monitoring wattage via a smart plug, and it lines up well with published benchmarks for power efficiency.Extras & Future-Proofing:ATX 3.1 & PCIe 5.1 ready105°C-rated Japanese capacitors (a must for long-term reliability)Modern Standby support works perfectly — fast wake times, zero sleep issues in Windows 11Final Thoughts:For anyone running a high-end system like mine — especially with power-hungry components like the i9-12900KS and RTX 3090 — this PSU offers peace of mind. No coil whine, no overheating, no second-guessing whether it’s enough. It’s quiet, efficient, and built with headroom for future GPUs thanks to the included 12V-2x6 cable and compliance with the latest standards.Highly recommend if you’re building or upgrading a performance-focused rig and want something that’ll last.