Corsair

CORSAIR RM1200x Shift Fully Modular ATX Power Supply + CORSAIR Premium PCIe 4.0 x16 Extension Cable 300mm - Black

Name: CORSAIR RM1200x Shift Fully Modular ATX Power Supply + CORSAIR Premium PCIe 4.0 x16 Extension Cable 300mm - Black
Brand: Corsair
SKU: B0DDQC2NTZ

Status: CORSAIR RM1200x Shift Fully Modular ATX Power…: Unavailable on Amazon as of 2026-10-05 10:21 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The CORSAIR RM1200x Shift Fully Modular ATX Power Supply + CORSAIR is a specs-and-price decision rather than a crowd-consensus one in the power supplies category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

Unavailable on Amazon as of 2026-10-05 10:21 UTC

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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:

Similar: CORSAIR RM1000x Shift Fully Modular ATX Power… — $249.98 on Amazon as of 2026-10-06 16:27 UTC (price may vary).

View Current Price — $249.98

Similar: CORSAIR HX1000i Fully Modular ATX Power Supply +… — $314.98 on Amazon as of 2026-10-06 12:20 UTC (price may vary).

View Current Price — $314.98

Similar: Corsair RM1200x Shift Fully Modular ATX Power… — $119.98 on Amazon as of 2026-10-06 22:22 UTC (price may vary).

View Current Price — $119.98

Original listing (currently unavailable) → Compare to similar power supplies

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-05

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ Backed by Corsair's warranty and support channels

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer 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…

SpecPicks Verdict

SpecPicks scored CORSAIR RM1200x Shift Fully Modular ATX Power Supply + CORSAIR… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Corsair's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key 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 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.
PCIe 4.0 Bandwidth: Take advantage of the advanced bandwidth and powerful performance of PCIe 4.0 x16 for your GPU, up to 64GB/sec.
Extended Length: A generous cable length of 300mm makes it easy to install your GPU vertically in compatible cases.
EMI Shielded: Electromagnetic interference shielded to eliminate signal interference and ensure maximum performance.

Full Specifications

Brand	Corsair
Color	Black
Wattage	1200 watts
Fan Count	1
Model Name	RM1200x Shift
Form Factor	ATX
EMI Shielded	Electromagnetic interference shielded to eliminate signal interference and ensure maximum performance.
Connector Type	ATX
Cooling Method	Air
Number of Fans	1
Output Wattage	1200 watts
Extended Length	A generous cable length of 300mm makes it easy to install your GPU vertically in compatible cases.
Compatible Devices	Personal Computer
PCIe 4.0 Bandwidth	Take advantage of the advanced bandwidth and powerful performance of PCIe 4.0 x16 for your GPU, up to 64GB/sec.
Power Supply Design	Full Modular
Minimum Input Voltage	110 volts_of_alternating_current
Intel ATX 3.1 Certified	Compliant with the ATX 3.1 power standard, supporting the PCIe Gen 5 platform and resisting transient power spikes.
System Bus Connector Type	ATX
Zero RPM Fan Mode Support	At low and medium loads the cooling fan switches off entirely for near-silent operation.
Connector Type Used on Cable	ATX

Ready to buy?

CORSAIR RM1200x Shift Fully Modular ATX Power Supply + CORSAIR Premium PCIe 4.0 x16 Extension Cable 300mm - Black is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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