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Black rectangular ATX power supply with 120 mm fan and green accent cables

ASRock

ASRock PRO-750B 750 W power supply

SKU CH-QX2N-5JSKB MPN PRO-750B

ATX 3.1 compatible 750 W unit with a native 12V-2x6 connector, 80 PLUS Bronze efficiency and a 120 mm fan

  • Max wattage750 W
  • Fan configuration1 × 120 mm
  • PSU length limit140 mm
  • Efficiency certification80 PLUS BRONZE Certified
  • Built-in protectionOCP, SCP, OVP, UVP, OTP, OPP
  • Mean time between failures>100,000 h

Wattage 750W

  • 80 PLUS Bronze certification delivers efficient 750 W power
  • ATX 3.1 and PCIe 5.1 ready with native 12V-2x6 connector
  • 120 mm fan runs quietly under load
  • Full protection suite includes OCP, SCP, OVP, UVP, OTP, OPP
  • >100,000 hour MTBF ensures long-term reliability

Value-focused ATX 3.1 power supply

The ASRock PRO-750B delivers 750 W of continuous power for mainstream desktop builds. It targets system assemblers who want dependable output without paying for premium efficiency tiers. The unit fits standard ATX bays and carries a three-year manufacturer warranty.

Single 12V-2x6 connector rated at 450 W

This model includes one native PCIe 5.1 12V-2x6 cable with dual-colour terminals that confirm full insertion. The connector supports modern graphics cards drawing up to 450 W on a single cable. Only one such connector is provided, so builds requiring two high-power GPUs cannot be accommodated.

120 mm fan with Bronze-rated efficiency

A 120 mm fan handles cooling while the 80 PLUS Bronze rating limits waste heat under typical loads. Full protection circuitry covers over-current, short-circuit, over-voltage, under-voltage, over-temperature and over-power events. Mean time between failures exceeds 100,000 hours.

How it compares

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

Price $53.99
Cheaper than about 89% of the 10,869 comparable items (median $142.99).
Max wattage 750 W
Lower than about 60% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameASRock
Product linePRO Series
Model namePRO-750B
Product colorBlack
Product typeATX 3.1 Compatible
Power
Max wattage750 W
Efficiency certification80 PLUS BRONZE Certified
Built-in protectionOCP, SCP, OVP, UVP, OTP, OPP
Size & build
Product dimensions140 × 150 × 86 mm
Shipping weight1.81 kg
Package size267 × 203 × 102 mm
Compatibility
PSU length limit140 mm
More details
Fan configuration1 × 120 mm
Mean time between failures>100,000 h

Other versions of this model

2 more in the same range

Questions about this item

What does the 750 W rating mean for my build?

The 750 W rating is the maximum continuous power the unit can deliver to all components combined, enough for most mid-range CPUs and a single high-end graphics card.

How does the ATX 3.1 and PCIe 5.1 compatibility affect what I can connect?

It provides a native 12V-2x6 connector rated for 450 W, allowing a direct link to modern graphics cards without an adapter.

Will the 140 mm depth fit in my case?

The power supply measures 140 mm deep, 150 mm wide and 86 mm high, so check your case clearance against those dimensions.

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