Customer Ratings & Reviews

Any time you pc is at idle, this PSU makes a terrible coil whine sound, loud enough to hear it the next room.

The PSU does not come with a user manual or spare cable bag (PSU, cables, 4 screws, Zip-ties and Safety Disclaimer). When I installed the RM850e and turned on my spare PC the GPU (560ti) emitted a very loud coil whine that sounded just like a telegraph machine from five feet away. The GPU's 12V coils could barely handle the massive 12V rail ripple coming from the PSU. The motherboard (MSI 890FXA-GD70) LED code started to flicker on and off. I pulled the plug and tried another functional GPU (GT740) and it was even worse. I reinstalled the old Corsair 550W PSU, now both GPU's have damaged volt pots and coil whine at idle. When I returned the PSU, Bestbuy accepted it and gave me store credit ($130.81). Avoid this PSU. Do not use it for "old" PC's that NO NOT meet ATX 3.1 power standards or it will damage your computer.

I bought it, but it wasn’t installed until three weeks later, and the unit didn’t turn on. They tested it, and it was dead. It took me another week to take it to the Best Buy store, and they told me I had 30 days to return it or exchange it, but it had already been 32 days, so I couldn’t return it. It turned out to be defective, and I lost my money.

I've used Corsair power supplies for many, many years. The power cables with this one are TERRIBLE. Forces you to use a million zip ties. I have an older 850x that has normal power cables. Very disappointed in the new cable design.

After fighting to get this to work with my new nVidia rtx 5080 card, i found it wasnt giving me steady power to memory or cpu, even with my old 3070 card. Unfortunately i also find that im outside of Best Buys ridiculous 14 day return window. Last thing i buy from Best Buy. Industry standard is st least 30 days.

this fried my whole system because there was short in it

Good quality power supply. The modular nature of it helps with keeping cabling clean, as you only have in there exactly what you need. 850W is good for most setups still as well, but make sure you don't need more.

Excellent power supply. Quiet, efficient, rock-solid stability, and clean modular cables for a premium build.

unit failed after 1 week replaced with the RM1000x instead

The RM850x power supply great. It was easy to install. It has great quality modular cables and is ready for the newer generation of GPUs with all required connectors. I am pairing it with an RTX 5080 and i5 13600k. If you're looking for a psu for an RTX 5090, id recommend going up to the 1000w variant. All in all, the RM850x power supply works great.

This was my first time replacing a PSU. The labels and organized packaging made it very intuitive for me and it works great!

Easy to set up, works perfectly in my build. Definitely recommend if 850W is what you need for a computer!

I changed my old power supply and it was worth it, excellent product

I never once used a modular power supply but this makes organizing in your case easier

Great PSU. Works awesome with all new gen hardware. Would Highly Rec to anyone building a med/high range pc. I would absolutely trust this product. Don't pay attention to the one star review bashing this company for "price baiting." They took a picture of a 79.99 price tag that had a thermaltake psu price tag for a corsair product. Maybe that person should have read the tag before picking something up.

The best feature of this power supply is the modular cabling. You can add the exact amount of cables you need for your build with translated to less clutter inside the box, for a more appealing aesthetic

Love corsair products. Best Buy always has great products. looking forward to my 9070 xt build.

Great price and great item met our expectations for the project at hand