Asrock PRO-850B 850W ATX PSU, 80 Plus Bronze
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About This Item
- 850W ATX 3.1 power supply with 80 PLUS Bronze certification
- Native PCIe 12V-2×6 cable with dual colour design for easy connection
- Comprehensive safety protections including OCP, SCP, OVP, UVP, OTP, and OPP
- 120mm silent cooling fan with flat cable design for efficient airflow
- Continuous 12V output of 70.8A with 200% total power excursion
- 3-year warranty with all Taiwanese capacitors for reliability
- Connectors include 24pin, 2x EPS 12V, 1x PCIe 5.1, 2x PCIe 6+2pin, and 4x SATA
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Asrock PRO-850B | 850W ATX 3.1 Bronze PSU
The Asrock PRO-850B 850W ATX Power Supply Unit, 80 Plus Bronze Certified, 120mm Silent Cooling Fan, High Efficiency PSU targets value-focused builders. It delivers reliable power for mid-to-high-end systems. This unit uses ATX 3.1 standards for modern hardware. It suits users needing stable performance without premium costs.
Asrock PRO-850B 850W ATX Power Supply Unit, 80 Plus Bronze Certified, 120mm Silent Cooling Fan, High Efficiency PSU
This section details the exact product model for clarity. It combines essential specs for UK PC builds. The design emphasises safety and efficiency.
Specifications
| Metric | Spec. |
|---|---|
| Continuous 12V Output | 70.8 A |
| ATX 12V Version | ATX 3.1 |
| Warranty | 3 Years |
| Dimensions (L x W x H) | 140mm x 150mm x 86mm |
| Fan | 120mm Silent Cooling Fan |
| Protections | OCP, SCP, OVP, UVP, OTP, OPP |
Native PCIe 12V-2×6 Cable Design
The unit includes a native PCIe 12V-2×6 cable. It features a dual-colour design with ASRock Classic Green connectors. This allows you to verify secure connections visually. Because the connectors are colour-coded, installation errors reduce. So, you gain confidence during GPU power setup.
80 PLUS Bronze Efficiency
This PSU is 80 PLUS Bronze certified. It offers efficient power conversion for typical loads. The PRO series targets value-focused users. However, efficiency varies with load and temperature. In practice, it helps manage electricity costs for UK rates. Always check your system’s total wattage needs.
Comprehensive Safety Protections
Safety is prioritised with full suite protections. These include OCP, SCP, OVP, UVP, OTP, and OPP. They safeguard components during normal to extreme power levels. For example, over-voltage protection prevents damage from spikes. Because all capacitors are Taiwanese, build quality is consistent. This ensures long-term reliability for your hardware.
Silent Cooling and Build Quality
A 120mm silent cooling fan manages thermals. It operates quietly under typical loads. The unit uses flat cables for easier routing. Dimensions are compact at 140mm x 150mm x 86mm. So, it fits most ATX cases without issue. However, confirm case clearance for cable space.
What is in the box
- Asrock PRO-850B 850W ATX Power Supply Unit
- Native PCIe 12V-2×6 Cable (Dual Color Design)
- ASRock Classic Green connectors for visual verification
- Standard motherboard and peripheral cables (as per specifications)
Check before you buy
- Confirm your case supports ATX PSU dimensions (140mm x 150mm x 86mm).
- Verify you have a UK plug adapter or cable, as this is not stated in this listing.
- Check motherboard compatibility for ATX 3.1 standards.
- Ensure your GPU needs match the PCIe 12V-2×6 cable provided.
Questions and answers
Is the Asrock PRO-850B compatible with UK mains voltage?
Does this PSU include a UK plug cable?
What is the warranty period?
Are the cables flat for easier management?
Does it support ATX 3.1 standards?
Summary & warranty
This PSU suits value-focused UK builders needing 850W with ATX 3.1 support. It is ideal for mid-range gaming or workstation systems. The 80 PLUS Bronze certification and safety features provide solid baseline performance. However, confirm UK plug availability and case fit before purchase. Covered by the applicable manufacturer warranty.

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