Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply
~£119.99typical UK price when we researched itAffiliate link. As an Amazon Associate I earn from qualifying purchases. Details
Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply review
Researched, not hands-on tested.How we review ›
by SudoPicks Research · editor Paul HR · published 25 Oct 2026 · updated 25 Oct 2026
The RM1000e suits builders who want a 1000W ATX 3.1 power supply for a modern high-end graphics card. It fits people who care about low noise at everyday loads and want a native 12V-2x6 cable in the box.
joint 7th of 16 power supplies we've reviewedAffiliate link. As an Amazon Associate I earn from qualifying purchases. Details
New to power supplies? What they are and what to look for
The power supply (PSU) turns mains electricity into the power every part of a desktop PC runs on. A good one is quiet, efficient and protects the rest of the PC if something goes wrong.
Do you need a power supply? Every desktop build needs one. Pre-built PCs already have one, but upgrading to a bigger graphics card can mean a bigger power supply.
What to look for
- Enough watts for your graphics card and processor, with some to spare: our PC build planner works it out
- 80 Plus Gold or better for lower running costs
- A long warranty: 7 to 10 years signals a well-made unit
Unsure about a word? Jargon explained
How the 7.2 adds up
Our power supplies rubric- Quality and protections30% of score
- Efficiency20% of score
- Noise15% of score
- Cabling and connectors20% of score
- Warranty15% of score
Against the 16 power supplies we've reviewed
bar = the range of all 16 · dot = this one · better →
- Overall score 7.2/10joint 7th of 16
- Price £119.9910th cheapest
- Value for money About average10th best of 15
Support and features
| Software updates | No end-of-support or end-of-life date announced; this search did not return a result, so one cannot be ruled out. |
|---|
Compatibility
| Linux | Not confirmed. No source confirms Linux support for the RM1000e; the kernel corsair-psu driver and liquidctl list only RMi and HXi models, and Corsair offers no Linux software. source |
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Pros and cons
+ pros
- Native 12V-2x6 cable and fully modular design
- Tight regulation, low ripple and working protections
- Quiet at low and moderate loads with zero-RPM mode
− cons
- Second-tier capacitors and MOSFETs, per Tom's Hardware
- Owners describe the cable bundle as minimal
- Owners question value against Corsair's own models
Price history
Price history appears here once we have tracked this product for a few days.
The full review
Where it fits
The RM1000e (2025) is a 1000W, fully modular ATX power supply from Corsair, released in January 2025. It is ATX 3.1 certified and PCIe 5.1 compliant. It measures 140 x 150 x 86 mm.
The rail layout is simple. The +12V rail delivers 83.3 A, the +3.3V and +5V rails give 150 W each, and the +5VSB standby rail gives 15 W.
Build quality and protections7/10
Tom's Hardware and Hardware Busters both identify the platform maker as HEC (Compucase). Tom's Hardware describes HEC as a reputable OEM. Its cold test measured load regulation within about 0.9% on the 12V rail and 0.7% on the 5V and 3.3V rails. Maximum ripple was 36 mV on 12V, 18 mV on 5V and 16 mV on 3.3V. Tom's Hardware also reports that over-current, over-voltage, over-power and short-circuit protections activated correctly.
The same review reports second-tier components, naming Teapo capacitors and Great Power MOSFETs. Owners raise this too, listing mid-tier parts as a complaint. The electrical results are solid, so the parts are a concern about the bill of materials rather than measured performance. Buyers who weigh component brands heavily will notice it.
Efficiency8/10
Corsair rates the unit 80 PLUS Gold and Cybenetics Gold. Hardware Busters measured it at Cybenetics Platinum levels: 89.483% at 115 V and 91.576% at 230 V. For a UK buyer on a 230 V supply, the higher figure is the relevant one. The measured result sits above the rated tier, which is a point in its favour for anyone running a high-wattage PC for long hours.
Noise7/10
The unit has a 120 mm rifle-bearing fan with a zero-RPM mode. Corsair says the fan stays off at low and moderate loads. KitGuru's noise figures by load are:
- Under 28 dBA at 100 W and 250 W
- 31.2 dBA at 500 W
- 33.8 dBA at 750 W
- 38.9 dBA at 1000 W
Cybenetics gives it an A- noise rating, with average noise a little above 25 dBA. Owners list quiet operation as praise. With figures like these, it suits a desktop that spends most of its time at light to mid loads. Sustained full-load use is where the fan becomes more audible, reaching 38.9 dBA at 1000 W.
Cables and connectors7/10
The RM1000e is fully modular, and owners praise the cabling and build quality. One native 12V-2x6 cable is included. The rest of the set includes:
- One 24-pin ATX cable
- Two EPS 8-pin connectors
- Seven SATA connectors
- Four PATA connectors
Seven SATA connectors give reasonable room for storage drives. Owners also complain that the bundle is minimal, so buyers planning a large multi-drive build should check the cable count against their parts list before ordering. The same goes for the two EPS connectors if the board needs more CPU power cables.
Warranty7/10
Corsair covers the unit for seven years.
Value
Owners raise price against Corsair's own models as a complaint. The practical point is that the RM1000e's strengths are electrical results, a native 12V-2x6 cable and low noise at modest loads. Its weak spots are second-tier parts and a minimal bundle.
Who it suits
The RM1000e fits a gaming or workstation build that needs a 1000W ATX 3.1 unit with a native 12V-2x6 cable. Its regulation, ripple and protection results, plus the quiet zero-RPM behaviour at lower loads, back that up. Buyers who put component quality first, or who need many extra cables, should look at the parts list and cable count before committing.
What owners report
Recurring themes from public owner feedback, summarised in our own words.
- Owners praise how quietly it runs.
- Owners like the fully modular cabling and the build quality.
- Some owners find the bundle minimal and the internal parts mid-tier.
- Some owners question the price compared with Corsair's own models.
Who should skip it
- Buyers who want premium-brand capacitors and MOSFETs inside the unit
- Builders needing a large cable bundle for many drives or accessories
- Anyone who wants ten-year warranty cover
Full specifications
| Rated output (W) | 1000 W rated continuous output; +12V rail 83.3 A; +3.3V and +5V 150 W each; +5VSB 15 W |
|---|---|
| Efficiency rating (80 Plus or Cybenetics) | 80 PLUS Gold and Cybenetics Gold per Corsair; Hardware Busters measured Cybenetics Platinum (89.483% at 115 V, 91.576% at 230 V) |
| Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x support | ATX, 140 x 150 x 86 mm; ATX 3.1 certified; PCIe 5.1 compliant |
| Modular cabling (fully, semi or non-modular) | Fully modular |
| Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count) | One native 12V-2x6 cable included; 1x 24-pin ATX, 2x EPS 8-pin, 7x SATA, 4x PATA; PCIe 8-pin count disputed across sources (2 to 6) |
| Fan size and zero-fan mode | 120 mm rifle-bearing fan with zero-RPM mode (fan off at low and moderate loads, per Corsair) |
| Warranty (years) | 7 years |
Alternatives
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