Corsair RM1200x Shift Fully Modular ATX Power Supply - Modular Side Interface - ATX 3.1 & PCIe 5.1 Compliant - Zero RPM Fan Mode - 105°C-Rated Capacitors - 80 Plus Gold Efficiency - Black
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Availability:
20 left in stock
Arrives
Apr 30 – May 2
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Style: RMx Shift (ATX 3.0 & PCIe 5.0)
Size: 1200W
Features
- Fully Modular Micro-Fit PSU Connectors: CORSAIR Type 5 Gen 1 micro-fit PSU cables mean you only connect the cables your system needs while taking up less space.
- Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting the PCIe Gen 5.1 platform and resisting transient power spikes.
- Zero RPM Fan Mode Support: At low and medium loads the cooling fan switches off entirely for near-silent operation.
- 100% 105C-Rated Japanese Electrolytic Capacitors: Premium internal components deliver unwavering power delivery and long-term reliability.
- Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
Description
CORSAIR RMx SHIFT Series fully modular power supplies boast a revolutionary side cable interface to keep all your connections within quick reach, for exceptionally convenient 80 PLUS Gold efficient power. With fully modular micro-fit connections and ATX 3.0 compliance, RMx SHIFT makes clean PC builds and upgrades even easier. RMx SHIFT PSUs use Japanese 105°C-rated electrolytic capacitors, for long life and reliability backed by a ten-year warranty. A 140mm fluid dynamic bearing fan utilizes a specially calculated fan curve for high performance and reliability with low noise, while Zero RPM mode support ensures virtually silent operation at low and medium loads. For quiet, efficient, and accessible power, put an RMx SHIFT Series PSU on your side.
Model Name: RM1200x SHIFT
Brand: Corsair
Compatible Devices: Personal Computer
Connector Type: ATX, EPS
Output Wattage: 1200
Form Factor: ATX
Wattage: 1200 watts
Cooling Method: Air
Item dimensions L x W x H: 7.09 x 5.91 x 5.08 inches
Item Weight: 4.4 Pounds
Product Dimensions: 7.09 x 5.91 x 5.08 inches
Item Weight: 4.4 pounds
Manufacturer: Corsair
Item model number: CP-9020254-NA
Date First Available: January 31, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Apr 30 – May 2
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: RMx Shift (ATX 3.0 & PCIe 5.0)
Size: 1200W
Does what it should. Powerful PC with lots of connections and 100% stable (as to be expected). Very silent. Side mounted cables are nice but not as trouble-free as I had expected. Its still a tight fit when you have a lot of cables and I did need a special connector to make ends meet. I am still sold to the side mount idea and if you have less stuff than I (the 98% will) it will be a huge advantage in cable management. Finally this comes with the special connector for the 4080/90, so no worry about melting plastic. [got the cheaper "as new" version - and mine was actually "new"]
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Reviewed in the United States on October 2, 2024 by Maiaibing
Style: RMx Shift (ATX 3.0 & PCIe 5.0)
Size: 850W
This is a great quality product from well-known reputable company, a PSU with great modularity and great performance, and frankly a good value. Lots of connectors and on the shift model, if that's what you're looking at side mounted connection points. Here's where the details come in. Is this PSU is primarily for cases with side mounted PSU slots, while in a wider case this might work in a flat mount situation, most likely you are going to need a fairly wide case to house the wiring coming off the supply without bending the wires too much. Even then in some side mount cases, or the PSU is mounted on its side, the wires sticking upright can still impede on certain things, for example with the Lian-Li o11 dynamic XL, The upright facing ports for the connectors on the wires to plug into impede with the bottom hot swap hard drive bay. Now if I really wanted to press the wires down flat against the power supply unit I could probably still fit the hot swap bay in the case, but it wouldn't give much room for the wires, nor allow for much passive heat dissipation from the PSU. In this particular instance with the case I chose a standard end connector output PSU would have been the better choice, as there is ample room at the end for wiring clutter, but due to the hot swap bay mounted above the power supply unit, the side output of the shift model is not intuitive for my case. Removal of the bottom hot swap bay in my case alleviated the issue, but also presents the inconvenience of not having all four hot swap bays available. I never thought I would use this feature, but over the years as I have acquired multiple hard drives and stored up massive amounts of data, it actually comes in handy for moving data back and forth between drives. So no stars docked for the design it's actually great, just really think about whether or not you need the side output connectors and whether or not you will have enough room in your case. They make it more convenient to plug and unplug additional wires without having to remove the power supply unit completely, however you may run into spacing issues in smaller cases. Situationally recommended.
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Reviewed in the United States on September 25, 2023 by Locus Solus
As someone who runs a home lab, finding the right power supply is crucial. The Corsair RM750x Shift PSU came highly recommended, boasting an A-tier ranking on SPL's PSU tier list and praised by tech YouTuber Wolfgang for its low power consumption at low wattages. After using it, I can confirm it lives up to the hype! Since homelab pc is on 24/7 having a quality psu sipping power on low wattage during idle was crucial. However, just be sure to check the case to ensure the side-mounted cables fit comfortably. It can be awkward fitting this psu.
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Reviewed in the United States on July 3, 2025 by Kris R.
Style: RMx Shift (ATX 3.0 & PCIe 5.0)
Size: 1200W
I’ve always hated how traditional PSU cables connect — reaching around the back, cramming fingers into tight spaces. That’s why I was excited about the Corsair Shift 1200X’s side-access design, and I’m happy to report: in real-world use, it’s even more convenient than I expected. ✅ Ease of installation: The side-mounted connectors make cable management a breeze, especially in larger cases where you have the rear panel clearance. For newer PC builders, this layout is much easier to work with compared to standard designs. ⚠️ Important tip: Before you buy, check your case dimensions carefully. If you’re building in a micro-ATX or ITX case, measure twice — this PSU’s side-access layout requires extra clearance on the rear side panel that small cases may not have. ✅ Noise & cooling: I can barely hear this PSU even under load, so I assume it’s cooling efficiently. No noticeable coil whine or fan ramping in my system. ✅ Cabling quality: I was pleasantly surprised by the included Corsair Type 5 cables — they’re flexible, well-made, and didn’t make me feel the need to swap them for aftermarket ones.lling I figured I would do a cable swap but was actually satisfied by the quality of cables it came with already
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Reviewed in the United States on May 24, 2025 by TheLEGinCLEGG
Style: RMx Shift (ATX 3.0 & PCIe 5.0)
Size: 850W
Love this unit and the side cable inputs. It makes for a much cleaner setup inside the case. No issues with the PSU at all, it is super quiet and does the job well. My only minor complaint is I wish the cables were braided. The prices for nicely braided cable extensions is a bit much, I would have expected a higher end PSU to include them out of the box.
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Reviewed in the United States on October 21, 2024 by Quis
Style: RMx Shift (ATX 3.0 & PCIe 5.0)
Size: 850W
Exelent
Reviewed in the United States on August 4, 2025 by will
Style: RMx Shift (ATX 3.0 & PCIe 5.0)
Size: 1200W
The media could not be loaded. Made a full Corsair build and was able to chain all the components to the single controller and it works like a charm. Pretty expensive but beautiful and a dream to install. No issues with Performance and VERY future proof. I have an HP 45L prebuilt and swapped everything except case, CPU and GPU (I9-14900k & 4090) Maybe just an issue with my pre-build’s case but the screws were hard to align
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Reviewed in the United States on July 16, 2025 by Jonathan Blaya