CORSAIR RM850x Fully Modular ATX Power Supply - 80 PLUS Gold - Low-Noise Fan - Zero RPM - Black

i just wanted to share some things about this psu.i generally appreciated this power supply. i had no major issues and appreciated the upgrade, the only thing i wanted to note is that the motherboard cables were really hard to insert into the psu for me, which was pretty annoying to do given i'm working around an injured finger. nothing concerning, but it made it a little frustrating to plug it all the way in.also, uh, UPDATE UR BIOS!!!!!!!! when i first installed this psu, it wouldn't post, it just put all the fans at max and refused to power off with the power button. obviously also check if your connections are secure, that's important too, but the thing that fixed it for me was temporarily switching back to the old power supply to update the bios on the motherboard. for whatever reason, that made my computer function perfectly as intended on the other power supply. this might've been because my bios was really old at this point... (my bios was from 2021... ik it's bad, it's fixed now)also here's a quick but more detailed explanation of the knob, because corsair refuses to explain exactly how the fan knob works in any of the official documentation that's easily accessible from a quick google search or the qr code guide on the box!!!!!!! (see below for my complains about that lol) it basically functions like a weird dimmer switch. if you turn it all the way clockwise until it clicks, it goes to auto, basically the fans run based on sensor data and tries to be as quiet as possible. adjusting it to its other settings changes it to a more manual fan control, which is useful if you want to prioritize thermals more, or just want to dial it in more specifically. i could not find this clearly explained in any of the official material for the psu, so i wanted to share. if you've got this psu and the fans are constantly super loud, try turning the knob counterclockwise, either to a lower setting or to the auto/quiet setting.last small thing, i hate that this power supply doesn't have a quickstart guide in the box. especially when the online guide is extremely basic and doesn't explain one of its unique features for some inane reason???? it's small but it's honestly EXTREMELY disappointing to see. if you won't have internet access as you install the psu, you might have a really frustrating time finding information, as the only included documentation is basic specs on the box and a safety manual.otherwise, i can't really give *that* thorough of a review. go read an actual review if you wanna know if you should buy this or not for your system. (this applies to all power supplies tbh) in addition to the specs you can get from the manufacturer, it can be helpful to see if the efficiency & noise levels are acceptable for you, and it can be a nice reassurance to go see how well the safety features function in third-party tests. basically all power supplies with the right basic features will function just fine as long as you avoid the few products that have been shown to have consistent issues. most of them are manufactured by the same couple of companies and work just fine. the only thing you might want to seriously consider is avoiding companies with a habit of being shitty about warranties. (just for reference, right now the main culprit for this seems to be asus, they've been reguarly screwing people who try to warranty things.)

I used this Corsair on a makeshift Plex Server build which is full of repurposed older parts, there was previously a 15 year old power supply in this case which needed to be upgraded so I picked 750w model for Corsair's reputation and it's power efficiency.The PSU is very silent, dead quiet because the fans don't run when it's at low usage. This Plex server build is only pulling approximately 80W under normal usage with the Corsair. On the ancient 15 year old power supply it was pulling approximately 120W under the same usage, so this Corsair power supply is giving me a 40W savings due to it's increased efficiency which is awesome.The build quality feels excellent and the cables provided are high quality and flexible making them easy to work with and route within the case. If you want to get fancy you could upgrade the cables to something like Cablemod cables but for my use with this Plex server it is not necessary as this wasn't meant to be a "pretty" build.This is my second Corsair power supply, I also have another model in my main system which has been running for a couple years without any issues. Most of Corsair's power supplies are on the high end of the PSU Tier list, google the PSU Tier List if you want to see it's exact rating among all other power supplies.

Pros:- Only plug in the cables you actually need - simplified cable management- Quiet fan that only kicks on under load- Straightforward install, great for hobbyist-level buildersCons:- I didn’t find it soonerFull Review:I brilliantly managed to short out the power supply on my PC (PSA: Don't plug a USB-C cable into a USB-A port if you don't want to risk taking out your power supply...), and I bought this Corsair RM1000x in a pinch because it would arrive the quickest. I’m more of an inquisitive hobbyist than a tech expert so had assumed a power supply is just a power supply, but this one had a few features I lucked out on.Super clean and minimal cabling - no medusa-style tangle of wires coming out of the box, just plug in what you need. It took care of the rats nest I had previously by not having to hide the unnecessary cables inside the case. As for the cables I did need, I have an ATX mid-tower case and cable lengths were perfect - not too tight or too slack.The fan stays off during low-demand tasks, then spins up when I’m processing video or doing something more power intensive. It’s quiet when it does turn on, and most of the time it’s completely silent.If you’ve ever blown a power supply and need a replacement you won’t regret, this is it. Honestly, I wish I had this one from the start — it’s one of those parts that just works and makes your build cleaner and quieter.

Knowing Corsair's generally solid reputation for power supplies, and seeing good reviews on Reddit, I grabbed the RM1000x to support my GPU upgrade from an NVIDIA 2080 to a 3090. An online calculator estimated I only needed about 700 watts for my system, but I wanted power to spare for eventual use in my next build. This model definitely felt like a quality unit, which lined up with what I was expecting. So far, so good. It's been running smooth for about a month now and I have no complaints, just steady power.The modular cables were a nice improvement over my previous supply and made the upgrade pretty easy. I only plugged in what I needed, making the cable routing look much nicer in my case. It's quiet and reliable and I haven't had to think about it since the initial install. Of course, that is exactly what you want when it comes to a power supply! I feel confident this was a good value and money well spent compared to cheaper alternatives.