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Corsair RM850e CP-9020338-EU ATX 3.1 Power Supply 850W Cybenetics Platinum Fully Modular with ThermalProtect 12V-2x6 Cable White

Brand:
Corsair
Corsair RM Series RM850e, 850W White (CP-9020338-EU)
Corsair RM850e CP-9020338-EU ATX 3.1 Power Supply 850W Cybenetics Platinum Fully Modular with ThermalProtect 12V-2x6 Cable White
€196.5 inc. VAT
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CP-9020338-EU
€165.13 €183.48
€196.50 inc. VAT
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Product Code
04:595482
EAN Code
0840440430964
Manufacturer
Corsair

Quick Specs

Output
850 W · ATX 3.1 / PCIe 5.1
Efficiency
Cybenetics Platinum · up to 91%
GPU Power
ThermalProtect 12V-2x6 + 3× 8-pin
Build
Fully modular · 140 mm · Zero RPM
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CORSAIR RM850e ATX 3.1 Power Supply with ThermalProtect 12V-2x6 Cable — White

850 W ATX 3.1Cybenetics PlatinumThermalProtect GPU CableFully Modular · Zero RPM

The CORSAIR RM850e (CP-9020338-EU) is a 850 W fully modular ATX 3.1 power supply for gaming and workstation builds that run a current graphics card with a 12V-2x6 power socket. This is the newer RMe generation that ships with CORSAIR’s ThermalProtect 12V-2x6 cable: a GPU power cable with a passive temperature switch in its comb that cuts the GPU’s power signal if the connector overheats. Efficiency is certified Cybenetics Platinum (up to 91%), the fan stops completely at low and moderate load, and the unit is only 140 mm long, so it fits compact cases that reject longer 1000 W designs. This part number is the White edition; CORSAIR lists no technical difference from the black CP-9020336-EU.

Compatibility — check before buying:
Modular cables are CORSAIR Type 4. Use only the cables in this box, or genuine CORSAIR Type 4 cables. Never plug in modular cables from another brand, or CORSAIR Type 5 cables (SHIFT, SF-L) — pinouts differ and hardware can be damaged. ThermalProtect has a direction: the end with the CORSAIR logo on the comb goes to the graphics card, the end labelled “PSU” goes to the power supply; reversed, the temperature protection does not work. GPU sockets: one native 12V-2x6 cable for a single RTX-class card, plus a 12V-2x6-to-2×8-pin cable and one single 8-pin lead for cards with classic PCIe sockets. The box includes an AC power cord and mounting screws; CORSAIR does not state the plug type. CORSAIR does not state whether the cables of the White edition are white — ask us if cable colour matters for your build.

Best For

✓ Gaming PCs with an RTX 40 / RTX 50-class GPU on a 12V-2x6 socket
✓ Builders worried about melted GPU power connectors
✓ Compact ATX cases with a short PSU bay (140 mm unit)
✓ Quiet builds — Zero RPM fan at low load

Key Features

 
ThermalProtect 12V-2x6 cable
A bimetallic switch sits inside the comb 30 mm from the GPU plug. At 65°C ±5°C it disconnects the sense pins, so the graphics card drops to minimum power or shuts down instead of letting the connector overheat. It resets itself when it cools — no software, no firmware.
 
ATX 3.1 and PCIe 5.1
Intel ATX 3.1 certified and PCIe 5.1 compliant, built to handle the short power spikes of current graphics cards. A single native 12V-2x6 cable carries up to 600 W to the GPU.
 
Cybenetics Platinum, Zero RPM
Up to 91% efficiency means less heat and a lower electricity bill under long gaming or rendering sessions. Cybenetics noise rating A; at low and moderate load the fan does not spin at all.
 
Fully modular, 140 mm short
Every cable detaches, including the 24-pin, so you connect only what your build needs. The 140 × 150 × 86 mm body leaves more room for cable management than longer units; 105°C-rated capacitors and a 100,000-hour MTBF.

Technical Specifications

Identification
Brand CORSAIR
Series RMe with ThermalProtect
Model RM850e ATX 3.1 Low-Noise ATX Power Supply with ThermalProtect 12V-2x6 Cable - White (EU)
Part Number CP-9020338-EU
EAN / GTIN 0840440430964
Power
Rated Output 850 W continuous
+12V 70.8 A (850 W)
Standards Intel ATX 3.1 certified · PCIe 5.1 compliant · Modern Standby
Efficiency & Acoustics
Efficiency Cybenetics Platinum — up to 91% (CORSAIR’s feature text and quick start guide; one spec row on the White 850 W page shows Gold)
Noise Rating Cybenetics A
Modular Cables (all ±10 mm)
Cable Type CORSAIR Type 4 — fully modular, debossed, low-profile combs
ATX 24-pin 1 × 610 mm
EPS12V 4+4-pin 2 cables, 750 mm
ThermalProtect 12V-2x6 1 × 650 mm, 600 W
12V-2x6 to 2× 8-pin PCIe 1 × 650 mm
Single 8-pin PCIe (6+2) 1 × 650 mm
SATA 1 cable with 4 connectors + 1 cable with 2 SATA and 2 Molex (750 mm)
Totals 1× 12V-2x6, 3× 8-pin PCIe, 2× EPS, 6× SATA, 2× Molex
Physical
Dimensions 140 × 150 × 86 mm (L × W × H)
Weight 2 kg
Protection
Circuit Protection OVP, UVP, OCP, OPP, OTP, SCP
GPU Connector Protection Passive thermal switch in the 12V-2x6 cable comb, trips at 65°C ±5°C
In the Box
Included Power supply, AC power cord, modular DC cables, cable ties, mounting screws, safety leaflet
Not included Printed manual, a second native 12V-2x6 cable
Warranty & Support
Warranty 1-Year Warranty (Singular)
Manufacturer Term CORSAIR publishes a 7-year warranty on this product. Singular’s direct warranty is 1 year; beyond that we assist you with the manufacturer’s warranty process for its full duration.
Local Support Send us your motherboard, case or power supply model and we confirm the fit before you order

Frequently Asked Questions

Will the RM850e power my RTX 50-series card?
If the card uses one 12V-2x6 (12VHPWR) socket and its maker recommends a 850 W supply or less, yes: the ThermalProtect cable delivers up to 600 W directly. Tell us the exact card and CPU and we check the total load for you.
What does ThermalProtect actually do?
It is a passive switch in the cable comb near the GPU plug. If the connector reaches about 65°C, it opens the sense line; the card reads this as insufficient power and limits itself or shuts down, and your display goes black. Once the cable cools the switch resets. It works with any GPU that has a native 12V-2x6 socket.
Can I reuse the cables from my old power supply?
Only if they are genuine CORSAIR Type 4 cables. Cables from other brands, and CORSAIR Type 5 cables, must never be used — the pin layouts differ even when the plugs look the same.
How is this different from the earlier RM850e?
The previous RM850e (2025, CP-9020296-EU) is Cybenetics Gold and has a plain 12V-2x6 cable. This version is Cybenetics Platinum and adds the ThermalProtect cable, with the same 140 mm size and cable set.
Singular Expert Insight
We recommend the RM850e with ThermalProtect over the earlier RMe for any build with a 12V-2x6 graphics card: the platinum-level efficiency and the overheat-protected GPU cable come at the same 140 mm size. At 850 W it suits most RTX 5070 Ti/5080-class builds; step up to the RM1000e (CP-9020339-EU) for top-end cards or heavy CPU loads. Browse all our PC power supplies or pair it with a graphics card and we check the load together.

Buyer’s Guide

Buy it if

You need 850 W ATX 3.1 power for a card with a 12V-2x6 socket, want the connector protected against overheating, and value a silent fan at idle and a short 140 mm body.

Skip it if

Your case needs a Type 5 CORSAIR PSU to reuse existing custom cables, or you want an SFX unit for a small-form-factor case — this is a 140 mm ATX supply.

Also consider

The RM1000e (CP-9020339-EU) if you need more headroom, the black edition (CP-9020336-EU) for a different look, or a separate CORSAIR ThermalProtect cable for a second PSU.

Features - Corsair - CP-9020338-EU

Colour
white
More Details
Product Code
04:595482
EAN Code
0840440430964
Manufacturer
Corsair
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