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Rectangular black metal box with modular cable sockets and a 135mm fan grille

Corsair

Corsair RM650X CP-9020091-NA 650W power supply

SKU CH-ES24-J6K2A MPN CP-9020091-NA

Delivers 650W through a fully modular ATX design with 80 PLUS Gold efficiency and a thermally controlled 135mm fan

  • Max wattage650 W
  • Power efficiency90%
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm Thermally Controlled Fan
  • Power factor correctionActive
  • Main power connector20+4Pin
  • Clean cable management with full modular design
  • Efficient 90% power conversion at typical loads
  • Quiet operation via 135mm thermally controlled fan
  • Broad GPU support with four PCIe 6+2-Pin connectors
  • Reliable protection including over voltage safeguards

RM650X 650W fully modular PSU

The Corsair RM650X is a 650W ATX12V and EPS12V power supply with full modular cabling and 80 PLUS Gold certification. It delivers up to 90% efficiency at typical loads and supports SLI and CrossFire multi-GPU configurations. A single +12V rail rated at 54A provides stable power for modern components. The unit accepts 100-240V input across 47-63Hz for worldwide use.

Straightforward install with cable management

Full modularity lets you attach only the cables your build needs, reducing clutter and improving airflow. The package includes a 20+4-pin motherboard cable, a 4+4-pin CPU cable, four PCIe 6+2-pin connectors, eight SATA connectors, seven peripheral cables and a floppy adapter. A 135mm thermally controlled fan spins only when required, so Zero RPM mode keeps the system silent at low load. The main mistake is leaving unused modular ports unplugged or forcing connectors the wrong way round.

Mid-range builds needing clean cabling

This unit suits gaming PCs and workstations that demand 650W with Gold efficiency and quiet operation. Builds planning multiple high-end GPUs or extreme overclocking should look at higher-wattage models. Systems requiring specialised server connectors or non-standard form factors will need a different platform.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $97.99
Cheaper than about 68% of the 10,869 comparable items (median $142.99).
Max wattage 650 W
Lower than about 70% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameCORSAIR
Product lineRMx Series
Model nameRM650X (CP-9020091-NA)
Product typeATX12 V / EPS12 V
Graphics
SLI supportReady
CrossFire supportReady
Ports & slots
PCIe power connectors4 × 6+2-Pin
SATA power connectors8
Output type+3.3 V @ 25A, +5 V @ 25A, +12 V @ 54A, -12 V @ 0.8A, +5VSB @ 3A
Power
Max wattage650 W
Power efficiency90%
Modular cablingFull Modular
Power factor correctionActive
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Supply voltage100–240 V
AC input frequency47–63 Hz
Rated input current10–5A
Size & build
Product dimensions3.39 in × 5.91 in × 6.3 in
Product weight3.69 lb (1.67 kg)
Shipping weight3.18 kg
Package size295 × 216 × 140 mm
Compatibility
Haswell compatibilityYes
Environment & compliance
Regulatory approvalsFCC, ICES, CE, UL / CUL, CSA, C-Tick / RCM, TUV, CB, CU, KC Mark, RoHS, WEEE, RoHS (China), REACH
More details
Fan configuration1 × 135 mm Thermally Controlled Fan
Mean time between failures100,000 h

Questions about this item

How can I confirm the 135 mm fan is running only when needed?

The 135 mm thermally controlled fan stays off at low loads; listen for silence during idle then verify spin-up under heavy GPU or CPU load.

Which cables come attached and which must I add for a full build?

Box includes 20+4 pin motherboard, 4+4 pin CPU, four PCIe 6+2 pin, seven 4-pin peripheral, eight SATA, one floppy adapter; no extra cables required for standard ATX builds.

Is the single +12 V rail rated at 54 A enough for my dual-GPU SLI setup?

Yes, the single +12 V rail delivers 54 A and the unit provides four PCIe 6+2 pin connectors, matching the SLI-ready spec for two graphics cards.

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