CorsairRM750e (2025) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black

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.

i ended up buying this to replace a power supply that blew on me corsair has never really let me down with power supplies the one time i didnt buy corsair the power supply blew up on me so i can say formyself atleast i will most likely only use corsair power supplies from now on as they are the only brand ive never had issues with modular is really nice because you can just use the cables you need making cable management way easier and effortless pretty much i like that alot the packaging the psu comes in is really nice and it has supported for the 12 volt high power connector which is nice so no need to use those adapters for your 40 to 50 series gpus

Had a faulty PSU in my prebuild and was scratching my head at to what could be the issue. Upgraded the ram, and applying new thermal paste to the CPU didn’t address the issue. Gave up and assumed it was the 14th gen Intel giving me problems. Nope, upgrading to the Corsair here fixed my issues! Love how modular it is. Before getting this Corsair, I did try out a cheaper alternative. While it did work, the cable management was horrendous and cables were even just a tad too short. Not here, the cables are nice and long, and I don’t need to stuff in a bunch of cables in the tower that arent plugged in anywhere!I will say the PSU fan does not turn on on low to medium loads. Even during my stress test in 3DMark, it never did come on! This is mentioned on the little sticker. To verify the fan does work, it will spin up briefly at your system boot up every time.Overall very happy with it, and I feel more comfortable knowing I have a higher quality PSU in my system (Acer Predator Orion RTX 4070 Super).

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.

I was planning on going with the Super Flower Leadex III 850W PSU and I saw this Corsair on sale for $20 less than the Leadex III Gold. So for $20 less I went from 850W to 1000W, that's a no brainer. What I love about this Corsair 1000W RM1000e is that it is a Tier A PSU. It is also fully modular and it has the latest connector inputs on the PSU.It also comes with a 12 pin cable on both ends ready for Nvidia's latest RTX 5 series GPU's. Instead of using the very stiff power adapter cable supplied with your Nvidia graphics card, you just plug and attach one end of the 12 pin cable to your RTX 5 series card and the other end to the Corsair PSU. No other cable adapters are needed.The Corsair RM1000e also uses high temp capacitors because if you are using an RTX 5090, you will probably draw 600W from that GPU and it will generate heat in the Corsair. Btw, I would not use a 1000W PSU for a 5090, i'm just saying that high power loads and draws from system components will stress the PSU and the capacitors should be able to withstand those loads and provide stable power not only to the GPU but the other system components.

Just wanted to write a review for this. It was brand new,weird to say this but I liked the way it smells got that fresh smell LOL, haven't tried it yet but all I need is one more part and I can start my PC build.[Update:] No problems with it working great with my 5070.:D