ASRock PRO-850B Power Supply - 850W 80 Plus Bronze Certified, ATX 3.1 Ready, PCIe 5.1 Compatible, 120mm Fan, Full Protection Circuit, 3-Year Warranty
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AI Verdict
This 850W 80 Plus Bronze ATX 3.1 power supply with a native PCIe 5.1 12V-2x6 connector is for budget-focused builders needing modern GPU compatibility.
This 850W 80 Plus Bronze PSU is a situational fit, offering essential ATX 3.1 and PCIe 5.1 compatibility with a native 12V-2x6 connector at an entry-level price point. Its 70.8A on the +12V rail supports demanding components, but the Bronze efficiency means more wasted heat and higher electricity bills over time compared to higher-rated units.
If you can stretch your budget, look for an 80 PLUS Gold certified PSU for better long-term energy savings and potentially higher quality internal components.
Regret Score™
Medium RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Delivers 850 watts, suitable for mid-range to high-end system builds.
- Complies with ATX 3.1 standards, supporting 200% total power excursion capability for next-gen components.
- Includes a native PCIe 5.1 12V-2x6 connector for modern graphics cards.
- Provides 70.8A on the +12V rail for stable CPU and GPU power delivery.
- Features OCP, OVP, UVP, OPP, OTP, and SCP for comprehensive system safety.
- Backed by a 3-year warranty.
Cons
- 80 PLUS Bronze certification offers lower efficiency compared to Gold or Platinum rated PSUs.
- Modularity is not specified, suggesting it is likely non-modular or semi-modular, which can complicate cable management.
- The 120mm fan is described as 'low noise' but lacks advanced features like a semi-passive mode for silent operation at low loads.
- ASRock is a newer entrant into the PSU market, lacking the long-standing reputation of established power supply brands.
Dimension Scores
The 850W output is substantial, but 80 PLUS Bronze certification is an average efficiency rating for current power supplies.
It uses a 120mm fan described as 'low noise,' but without a semi-passive mode, it will always be active, potentially generating some audible hum.
While ASRock states 'full protection circuit' and a 3-year warranty, the Bronze rating often implies more cost-effective internal components compared to Gold or Platinum units.
Modularity is not specified, suggesting it is likely non-modular or semi-modular, which typically makes cable management more challenging than fully modular designs.
Best For
- PC builders on a strict budget needing 850W with ATX 3.1 and PCIe 5.1 support.
- Systems with a single modern high-power draw GPU requiring a native 12V-2x6 connector.
- Users prioritizing wattage and modern compatibility over peak efficiency or advanced features.
Not Recommended For
- Enthusiast builds demanding 80 PLUS Gold or Platinum efficiency for lower energy consumption.
- Users who require fully modular cabling for a clean aesthetic and simplified installation.
- Silent PC enthusiasts needing a PSU with a semi-passive fan mode.
Watch Out For
- No user-reported pitfalls are available as the product's release date is September 26, 2025, meaning no real-world feedback exists yet.
Full Specifications
| ASIN | B0FSTN2215 |
| Brand | ASRock |
| Wattage | 850 watts |
| Model Name | PRO-850B |
| Form Factor | ATX |
| Item Weight | 4.64 pounds |
| Manufacturer | ASRock |
| Connector Type | PCI Express, SATA |
| Cooling Method | Air |
| Output Wattage | 850 Watts |
| Item model number | 90-UXR085-BNUAA2 |
| Compatible Devices | Personal Computer |
| Product Dimensions | 5.51 x 5.91 x 3.39 inches |
| Maximum Input Voltage | 264 Volts (AC) |
| Item dimensions L x W x H | 5.51 x 5.91 x 3.39 inches |
What Buyers Say
As of March 2026, there are no real user reviews available for the ASRock PRO-850B Power Supply because the product's official release date is September 26, 2025. Therefore, specific user-reported praise, complaints, or long-term ownership insights cannot be provided.
“Can't say anything yet, this thing isn't even out! How am I supposed to know if it's gonna blow up my GPU or not?”
Frequently Asked Questions
What efficiency rating does the ASRock PRO-850B have?
The ASRock PRO-850B is 80 PLUS Bronze certified, meaning it is at least 82% efficient at 20% load, 85% at 50% load, and 82% at 100% load.
Is this power supply compatible with the latest graphics cards?
Yes, it is PCIe 5.1 compatible and includes a native 12V-2x6 connector (12+4pin) designed for modern, high-power graphics cards.
What are the dimensions of the ASRock PRO-850B?
The power supply measures 140mm (L) x 150mm (W) x 86mm (H).
Does this PSU offer protection against power issues?
Yes, it features comprehensive protections including OCP (Over Current Protection), OVP (Over Voltage Protection), UVP (Under Voltage Protection), OPP (Over Power Protection), OTP (Over Temperature Protection), and SCP (Short Circuit Protection).
What kind of warranty does the ASRock PRO-850B come with?
It comes with a 3-year warranty, providing coverage for potential defects or issues.
Buying Guide
When you're looking at power supplies, you're essentially picking the heart of your PC. It needs to deliver enough juice for all your components, especially your graphics card and CPU, without overheating or failing. Don't just look at the wattage; consider the efficiency rating and connector types, especially if you're building with newer, power-hungry parts.
Wattage (850W)
This is the total power your PSU can supply. Think of it like the horsepower of a car; more watts mean it can handle more powerful components. 850W is enough for most single high-end GPUs and CPUs, but always check your component's recommended PSU wattage.
80 PLUS Bronze Certified
This certification indicates how efficiently the PSU converts AC power from your wall into DC power for your PC. Bronze means it's at least 82% efficient under typical loads. Higher ratings (Gold, Platinum) mean less wasted energy as heat, saving you a bit on electricity and keeping your system cooler.
ATX 3.1 Ready & PCIe 5.1 Compatible
These are the latest industry standards. ATX 3.1 means the PSU can handle sudden, brief spikes in power demand from modern GPUs without shutting down. PCIe 5.1 compatibility, especially with a native 12V-2x6 connector, is crucial for the newest graphics cards like the RTX 40-series, ensuring they get stable power without needing adapters.
Alternatives
If this PSU doesn't fit, search for units with 80 PLUS Gold or Platinum efficiency for better energy savings, or fully modular designs for easier cable management, especially if your case has a window.
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