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Black fully modular ATX power supply with 120 mm fan and 90-degree 12V-2x6 connector

Cooler Master

Cooler Master MPX-8503-AFAG-2BUV 850 W power supply

SKU CH-AEGT-SX7RG MPN MPX-8503-AFAG-2BUV

Fully modular 850 W ATX 3.0 PSU with 80 Plus Gold efficiency, Cybenetics Platinum rating, 120 mm HDB fan, zero-RPM mode, 90° 12V-2x6 PCIe 5.1 connector and Japanese capacitors

  • Max wattage850 W
  • Power efficiency>= 90% @ Typical Load
  • Modular cablingFull Modular
  • Fan configuration1 × 120 mm HDB fan
  • Power factor correctionActive
  • PSU length limit180 mm

Wattage 850W

  • 80 Plus Gold certified for 90% typical efficiency
  • ATX 3.1 support with 12V-2x6 connector delivering up to 600W to GPU
  • Fully modular cabling reduces clutter and improves airflow
  • Zero-RPM fan mode activates only when temperature demands cooling
  • 100% Japanese capacitors enhance efficiency and reduce ripple noise

Built for modern GPU power

This fully modular ATX 3.1 power supply delivers 850 W and includes a native 90-degree 12V-2x6 PCIe 5.1 connector rated for 600 W. It targets builders who need reliable, high-efficiency power for current-generation graphics cards without cable clutter. Japanese capacitors and an LLC resonant topology support stable output across the load range.

80 Plus Gold with Titanium-class light-load

The unit meets 80 Plus Gold certification and reaches Titanium-level efficiency at 10% and 20% loads on a 115 V input. Active PFC corrects the power factor across a 100-240 V, 50/60 Hz range. Hold-up time is at least 16 ms at full load, and the power-good signal arrives within 100-150 ms. Protection circuits cover OPP, OVP, OTP, OCP, SCP, UVP, plus surge and inrush events.

Check case length and ATX 3.1 readiness

The chassis measures 180 mm deep, so verify your case clearance before ordering. Your motherboard and GPU must support the ATX 3.1 standard and the 12V-2x6 connector to use the native cable; otherwise an adapter will be required. The 120 mm HDB fan runs in a zero-RPM mode until thermal thresholds are reached, so ensure your case airflow can handle the heat when the fan spins up.

How it compares

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

Price $107.99
Cheaper than about 64% of the 10,869 comparable items (median $142.99).
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameCooler Master
Model nameMPX-8503-AFAG-2BUV
Product colorBlack
Product typeATX 12 V Ver. 3.0
Ports & slots
Output type+3.3 V@20A, +5 V@20A, +5Vstb@3A
Power
Max wattage850 W
Power efficiency>= 90% @ Typical Load
Modular cablingFull Modular
Power factor correctionActive
Power good signal100-150 ms
Power hold-up time>= 16 ms at 100% Load
Efficiency certification80 PLUS GOLD Certified
Built-in protectionOPP/ OVP/ OTP/ OCP/ SCP/ UVP/ Surge & Inrush Protection
Supply voltage100–240 V
AC input frequency50/60 Hz
Rated input current10–5A
Size & build
Product dimensions7.09 × 5.91 × 3.39 in
Product weight6.46 lb (2.93 kg)
Shipping weight2.74 kg
Package size306 × 203 × 127 mm
Compatibility
PSU length limit180 mm
In the box
Included itemsMWE Gold 850 V3
Connectors
Power Cord
4x screws
Manuel
Environment & compliance
Regulatory approvalscTUVus, TUV, CE, FCC, BSMI, CCC, EAC, RCM, UKCA, RoHS2.0 / BIS, KC (based on region’s request.)
More details
Fan configuration1 × 120 mm HDB fan
Mean time between failures>100,000 h

Other versions of this model

1 more in the same range

Questions about this item

Will the 180 mm length fit in a compact case?

At 180 mm long it fits most mid-tower and many compact cases; measure your chassis clearance before ordering.

Does the 90° 12V-2x6 cable clear tall GPU back-plates?

The right-angle 12V-2x6 connector routes close to the card, reducing bend radius and avoiding interference with large coolers.

What does the Zero-RPM mode do at idle?

The 120 mm HDB fan stays off until internal temperature rises, giving silent operation during light workloads.

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