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CORSAIR RMe Series RM850e 850 W ATX 3.1 Compatible Cybenetics Gold Full Modular Power Supply
- Fully Modular PSU: Reliable and efficient, low-noise power supply with fully modular cabling, so you only have to connect the cables your system build needs.
- Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting PCIe 5.1 platform withstands 2x transient power excursions from the GPU.
- Keeps Quiet: A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load.
- 105°C-Rated Capacitors: Delivers steady, reliable power and dependable electrical performance.
- Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
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Overview
Specs
Reviews (1,404)
2025 RME SERIES, RM850E, 850 WATT, ATX 3.1, PCIE 5.1, CYBENETICS GOLD CERTIFIED,
Warranty & Returns
Warranty, Returns, And Additional Information
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- Return for replacement until: January 31, 2027
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The CORSAIR RMe Series RM850e is an 850W fully modular ATX 3.1 power supply built for modern gaming and performance PCs, especially users pairing current GPUs with a clean, low-noise setup. Its Cybenetics Gold efficiency, native 12VHPWR support, and compact 140mm length make it a strong fit for streamlined mid-tower builds.
Recommended For
- Builders pairing a mid-to-upper-tier gaming GPU with a modern ATX 3.1 system, especially RTX 5070 / 5070 Ti or similar-class builds that need a native 12V-2x6 cable without stepping up to a 1000W unit.
- PC builders who want an easier install in compact or cable-sensitive cases, since the short 140mm housing and fully modular cabling are repeatedly positioned as fit-and-routing advantages rather than raw performance features.
- Users building a clean everyday gaming or creator desktop that spends most of its time below heavy sustained load, where review testing shows the fan stays off or very quiet through lower-to-mid power draw.
- Value-focused upgraders replacing an older PSU for a current-gen GPU build, especially people who want modern connector support and decent efficiency from a known brand without moving into premium flagship PSU pricing.
Real-World Use Scenarios
- Building a mid-to-high-end gaming PC with a modern NVIDIA GPU: users can power a current PCIe 5.x card with the included 12V-2x6 cable and typically get stable day-to-day gaming without needing adapter cables, while keeping the build neat because only the required modular cables need to be installed.
- Upgrading from an older pre-ATX 3.0 power supply for a newer GPU: the main real-world benefit is better handling of short GPU power spikes, so users are less likely to worry about transient-load compatibility when moving to a newer graphics card generation.
- Putting together a quiet everyday gaming or work PC: in normal desktop use and moderate gaming loads, users should expect low PSU noise most of the time, though review testing suggests fan noise becomes more noticeable as load climbs well past typical midrange use.
- Assembling a compact ATX build where cable space is tight: the short 140 mm housing and fully modular cabling make installation easier in smaller mid-towers, with less cable clutter around the PSU shroud and more room to route GPU and motherboard cables cleanly.
- Running a performance-focused gaming system with a strong CPU and upper-midrange GPU: 850 W is generally a practical fit for setups in the RTX 5070 Ti class, but users planning an ultra-high-draw card like an RTX 5090-class build may be better served by moving up to a higher wattage model.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Desktop systems requiring ATX 3.1 and PCIe 5.1 support with up to 850 W of fully modular power delivery for modern high-power GPUs and components |
| Power And Output | 850 W total output; DC rail distribution listed as +3.3V@20A, +5V@20A, [email protected], +5Vsb@3A |
| Efficiency And Certification | Cybenetics Gold efficiency rating |
| Cooling And Fans | Air cooling with a single 120 mm fan |
| Connectors And Modularity | Full-modular cabling; includes 1 x 12VHPWR (12+4) PCIe, 1 x 24‑pin ATX main connector, 1 x 8‑pin (6+2) PCIe and 6 x SATA |
| Input And Electrical | AC input range 100–240 V with 47–63 Hz frequency support (minimum 100 V, maximum 240 V) |
| Form Factor And Dimensions | ATX 3.1 compatible; maximum PSU length 140 mm; product dimensions 5.91 x 5.51 x 3.35 inches; item weight 3.37 lb |
| Packaging And Contents | Sold as a single unit (package quantity 1); no batteries required or included |
| Compatibility | Listed compatible device: monitor (listed by third-party attribute service) |
| Model Identifiers | CORSAIR RM850e (RMx Series), Model/Part CP-9020296-NA; Manufacturer: Corsair; Style: RMe (2025) ATX 3.1, PCIe 5.1 |
Reference Q&A
Q: Should I buy the Corsair RM850e or RM750e for a gaming PC?
A: Choose the RM850e if you want more upgrade headroom for newer high-end GPUs, higher transient load tolerance within the same ATX 3.1 platform, or if the price gap is small. Choose the RM750e if your build stays in the mid-range and you want the lower-cost version of the same series design. External review coverage and Corsair's own lineup positioning show these models target the same buyer, with wattage capacity being the main decision point.
Q: Is the Corsair RM850e enough, or should I move up to the RM1000e?
A: The RM850e is the better fit when 850W already covers your CPU and GPU plan and you want to keep size and cost in check. Move to the RM1000e if you are building around a very power-hungry GPU, expect future upgrades, or want more overhead for transient spikes and sustained heavy loads. Review data suggests the 1000W step-up is mainly about capacity planning rather than a different class of feature set.
Q: Corsair RM850e vs RM850x: which one makes more sense?
A: Choose the RM850e if you want a shorter ATX 3.1 unit with modern GPU cable support and a lower entry price in Corsair's lineup. Choose the RM850x if you are prioritizing the more premium tier within Corsair's range, including quieter positioning, a fluid dynamic bearing fan, and a longer stated warranty. Corsair's own lineup and third-party reviews consistently place RMx above RMe as the higher-tier option, while RMe remains the more compact value-oriented choice.
Q: Is the 2025 Corsair RM850e a better buy than an older RM850 or RM850x generation?
A: The 2025 RM850e is the more practical choice if you want native ATX 3.1 compliance and a dedicated 12V-2x6 cable for current-generation GPUs without adding adapters. An older RM850 or RM850x generation can still be a strong option for existing systems, but the newer RM850e is easier to recommend for fresh builds centered on modern GPU compatibility and current power-standard support.
Q: Corsair RM850e or Seasonic GX-850: which should I choose?
A: Choose the RM850e if you want a compact 850W ATX 3.1 unit from a mainstream Corsair platform with a native 12V-2x6 cable and broad builder familiarity. Choose a Seasonic GX-850 alternative if pricing, regional availability, or your preference for Seasonic's platform and support ecosystem makes it the better fit. In this comparison, buyer decisions usually come down to price, size, connector readiness, and brand preference more than a large feature gap.
Q: Is the RM850e a good fit for a modern gaming PC with an RTX 4070 Super, 5070 Ti, or similar GPU?
A: Yes. This 850W model is a practical fit for many upper-midrange to high-end gaming builds, especially if you want an ATX 3.1 power supply with native 12VHPWR support for newer GPUs. Retail Q&A repeatedly centers on RTX 4070 Super, 50-series, and similar compatibility, which suggests this is a primary buying concern. It is most suitable for single-GPU builds where 850W is enough headroom for the CPU and graphics card combination.
Q: Does it include the cables I need, or do I need to buy extra cables separately?
A: For a typical new PC build, it should include the essential PSU cables you need. This is one of the most repeated retail questions for the RM850e. Because it is fully modular, you only attach the cables required for your build, which helps with cable management. You may still need extras only for unusual storage-heavy or accessory-heavy setups beyond the included cable set.
Q: Is the RM850e better for compact or easy-to-build systems?
A: Yes, for many standard ATX and some smaller cases, the RM850e is appealing because it combines a short 140 mm housing with fully modular cabling. Repeated retail questions about Mini-ITX compatibility and cable inclusion point to ease of installation as a real decision factor. It is a better fit for builders who want easier cable routing and less clutter, but you still need to confirm your case supports a standard ATX power supply.
Q: Who is the RM850e most suitable for?
A: It is most suitable for mainstream to enthusiast desktop builders who want a current-spec 850W PSU without stepping up to a more premium or higher-wattage model. The strongest fit is a single-GPU gaming or productivity PC that benefits from ATX 3.1 support, modern GPU cabling, modular installation, and low-noise operation. It is less compelling if you need unusually high connector counts, extreme overclocking headroom, or a PSU chosen mainly for premium-tier features rather than practical value.
Q: Should I choose the RM850e over a similar 850W alternative like the RM850x or MSI MAG A850GL?
A: Choose the RM850e if your priority is a current ATX 3.1, fully modular 850W unit aimed at modern GPU compatibility and straightforward installation. A comparable alternative may be better if you are optimizing for a lower price, more premium positioning, or brand-specific preferences. In short: the RM850e is the safer choice for buyers who want up-to-date platform support and practical features, while competitors may win on either value or step-up refinement depending on price at checkout.
Q: Is the Corsair RM850e a good buy for a modern gaming PC with an RTX 4080-class GPU?
A: Yes for most mainstream to high-end gaming builds. An 850 W ATX 3.1 PSU with a native 12VHPWR connection is a practical fit for GPUs in the RTX 4080 class, and the RM850e is positioned for that use case. It is a stronger fit if you want modern GPU cable support in a compact 140 mm PSU. The main caution from community discussion is not power capacity, but whether noise behavior matters to you.
Q: Who is the RM850e best suited for?
A: It is best suited for builders who want an 850 W fully modular PSU with current ATX 3.1 and PCIe 5.x support, especially in cases where PSU length matters. Its 140 mm size makes it easier to fit than some longer 850 W units, and it makes the most sense for users building a current-gen gaming PC rather than a legacy multi-cable GPU setup.
Q: What are the main trade-offs versus the Corsair RM850x?
A: The RM850e is typically the more compact, more modern-cable-oriented option, while the RM850x is commonly discussed as the more premium alternative. Community comparisons repeatedly focus on the RM850x having better acoustics or perceived build quality, while the RM850e trades that for lower cost and shorter length. If quiet operation and extra cable flexibility matter more than compact size, the RM850x is often the safer pick.
Q: Is the RM850e a good choice if I care a lot about low noise?
A: Maybe, but it is not the safest choice if noise sensitivity is your top priority. Repeated Reddit discussions around the RM850e mention coil whine or buzzing at idle or low load. That does not mean every unit has the issue, and it does not automatically indicate a power delivery problem, but it is a recurring enough discussion point that quiet-focused buyers should treat it as a real trade-off.
Q: Is the RM850e worth buying, or only if the price is right?
A: Mostly if the price is right. Community discussion consistently treats the RM850e as a competent PSU, but not automatically the best value in every market. It becomes an easier recommendation when it is clearly cheaper than more premium 850 W models. If it is priced close to an RM850x or another higher-tier alternative, buyers often see less reason to choose it.