ASRock PRO-850B 850W 80 Plus Bronze ATX 3.1 PSU
ASRock
ASRock PRO-850B 850W 80 Plus Bronze ATX 3.1 PSU
The ASRock PRO-850B 850W 80 Plus Bronze ATX 3.1 PSU is designed for value-focused PC builders who need a dependable power supply with modern connector standards without overspending. It carries 80 PLUS Bronze efficiency certification and is compliant with ATX 3.1 and PCIe 5.1, making it ready for current-generation graphics cards via its native 12V-2x6 connector. A full suite of protection circuits and a 3-year warranty back everyday builds from standard desktop use through more demanding configurations.
Why this product
ATX 3.1 and PCIe 5.1 compliant
It meets the ATX 3.1 specification and is PCIe 5.1 ready, so it can handle the power delivery requirements of current-generation GPUs without adapters.
Native 12V-2x6 connector included
A native 12+4-pin 12V-2x6 connector is built in, eliminating the need for bundled adapter cables and reducing connection risk with high-draw graphics cards.
80 PLUS Bronze efficiency certified
The 80 PLUS Bronze certification means it meets a recognised standard for energy conversion efficiency across its operating load range.
Six hardware protection circuits
It includes OCP, OVP, UVP, OPP, OTP, and SCP protections to guard components against overcurrent, overvoltage, undervoltage, overpower, overtemperature, and short-circuit events.
Low-noise 120mm fan
A 120mm low-noise fan handles thermal management, keeping the unit quiet during typical desktop workloads.
3-year warranty
ASRock backs this unit with a 3-year warranty, providing long-term assurance for a core system component.
- Wattage850W
- Efficiency80 PLUS Bronze
- ATX VersionATX 3.1
- PCIe ConnectorNative 12V-2x6 (12+4-pin)
- ModularNon-modular
- Fan120mm Low Noise Fan
- Dimensions140 × 150 × 86mm
- Warranty3 Years
- SKUASR-3348
- EAN4711581491403
- Compatible with ATX 3.1 motherboard and case form factors.
- Works with PCIe 5.1 graphics cards via the included native 12V-2x6 (12+4-pin) connector.
- Accepts a wide AC input range of 100–240V at 50–60Hz, suitable for use in most countries.
- Non-modular design: all cables are permanently attached, so case compatibility and cable management space should be confirmed before purchase.
- Dimensions are 140 × 150 × 86mm — verify your case supports this depth before ordering.
Best for
- Value-focused desktop builders who want a certified, modern-standard PSU at a competitive price point — the PRO series is explicitly positioned for this audience.
- Current-generation GPU users who need a native 12V-2x6 connector without relying on adapter cables.
- Builders prioritising protection coverage — six independent protection circuits address the most common fault scenarios in a desktop system.
- 850W system builds where mid-to-high-power CPUs and GPUs are in use but full modular cable management is not a priority.
Trade-offs
- Cable-management-sensitive builds where a fully modular or semi-modular PSU is preferred — this unit is non-modular and all cables remain attached.
- Efficiency-priority builds requiring 80 PLUS Gold or higher certification — this unit is rated Bronze.
- Systems requiring more than 850W — this is the highest wattage in the PRO series as listed, and it should not be run beyond its rated output.
- Workstation or server environments expecting extended warranty coverage beyond 3 years or hot-swap redundancy — this is a standard ATX desktop PSU.
With ASRock Classic Green connectors, users can easily see if the connector has been plugged properly.
The PRO series is created for value-focused users, offering 80 PLUS Bronze models in 850W, 750W, and 650W options.
Full suite of protections to keep all components safe during normal to extreme power levels.
ASRock offers an outstanding 3 –Year warranty, guaranteeing long term reliable and peace of mind operation.
General
| Brand | ASRock |
|---|---|
| Model | PRO-850B |
| Wattage | 850W |
| Modular | Non-modular |
| Dimensions | 140 × 150 × 86mm |
| Warranty | 3 Years |
Standards & Compliance
| 80 PLUS Certification | Bronze |
|---|---|
| ATX Version | ATX 3.1 |
| PCIe Compliance | PCIe 5.1 |
Power & Connectivity
| AC Input | 100–240V~, 50–60Hz, 12–6A |
|---|---|
| PCIe Connector | Native 12V-2x6 (12+4-pin) |
Cooling & Protection
| Fan | 120mm Low Noise Fan |
|---|---|
| Protections | OCP, OVP, UVP, OPP, OTP, SCP |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.