3 Best ASRock 850W PC Power Supplies, Compared
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You need the best ASRock 850W PC power supplies for reliable system performance. We compared 3 models using only published specifications. The ASRock Steel Legend White 850W ATX 3.1 PSU leads because it supports ATX 3.1 standards with a 12V-2x6 connector. This makes it ideal for modern builds. Our picks focus on efficiency ratings, form factors, and connector types. Use this guide to decide which unit fits your case dimensions and GPU requirements.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | ASRock Steel Legend White 850W ATX 3.1 PSU Best overall | ATX cases needing PCIe 5.1 support | Check price of ASRock Steel Legend White 850W ATX 3.1 PSU on Amazon |
| 2 | ASRock PG-850G 850W PSU Best premium | Modern gaming builds with PCIe 5.1 GPUs | Check price of ASRock PG-850G 850W PSU on Amazon |
| 3 | ASRock PRO 850G 850W Gold PSU Best budget | Standard ATX builds needing gold efficiency | Check price of ASRock PRO 850G 850W Gold PSU on Amazon |
The best fit for you
- You need ATX 3.1 support for PCIe 5.1 GPUs ASRock Steel Legend White 850W ATX 3.1 PSU It features ATX 3.1 compliance and a 12V-2x6 connector for modern graphics cards.
- You want a budget option for modern gaming builds ASRock PG-850G 850W PSU This model includes PCIe 5.1 support and 80 Plus Gold efficiency for cost-effective performance.
- You prioritize gold efficiency in standard ATX cases ASRock PRO 850G 850W Gold PSU It offers 80 Plus Gold efficiency and native PCIe 5.1 connectivity for reliable power.
Our 3 picks
ASRock Steel Legend White 850W ATX 3.1 PSU
Best for: ATX cases needing PCIe 5.1 support
- Size
- 850W (what this guide is about)
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold, Cybenetics Platinum
- Modularity
- Full Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: ASRock Steel Legend White 850W ATX 3.1 PSU Affiliate link
This ASRock 850W power supply features ATX 3.1 compliance and a 12V-2x6 connector for modern GPUs. It carries an 80 PLUS Gold efficiency rating and a Cybenetics Platinum certification. The unit uses a 135 mm fan with iCOOL intelligent control. It is fully modular and includes a 10-year warranty. This model suits builders needing reliable high-wattage support with advanced cable standards.
Pros
- ATX 3.1 standard with 12V-2x6 PCIe connector
- 80 PLUS Gold and Cybenetics Platinum efficiency
- 135 mm fan with iCOOL intelligent control
- Fully modular cable design
- 10-year global warranty
Cons
- Heavier at 6.59 pounds compared to competitors
- Larger dimensions than SFX form factors
- Not compatible with all built-in systems
Good fit if
- You need ATX 3.1 support for new GPUs
- You prefer fully modular cable management
- You want a long warranty period
Skip if
- You are building in a small SFX case
- You require a compact micro-ATX form factor
- You are using a pre-built system with compatibility restrictions
Verdict: ASRock Steel Legend 850W ATX 3.1 fits users upgrading to PCIe 5.1 GPUs who need robust efficiency and a long warranty. It is ideal for standard ATX cases where weight and size are not primary constraints.
ASRock PG-850G 850W PSU
Best for: Modern gaming builds with PCIe 5.1 GPUs
- Size
- 850W (what this guide is about)
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: ASRock PG-850G 850W PSU Affiliate link
The ASRock PG-850G Phantom Gaming delivers 850W of power with 80 PLUS Gold and Cybenetics Platinum efficiency ratings. It supports ATX 3.1 and PCIe 5.1 standards, featuring a native 12V-2x6 connector for modern GPUs. The unit uses fully modular cables and Japanese capacitors for stable performance. Its 135mm FDB fan includes iCool technology for quiet operation. This model suits gamers seeking reliable high-efficiency power.
Pros
- 80 PLUS Gold and Cybenetics Platinum efficiency ratings
- ATX 3.1 and PCIe 5.1 compliance
- Native 12V-2x6 connector with TempGuard technology
- Fully modular cable design
- 135mm striped axial FDB fan with iCool control
Cons
- Heavier at 7.8 pounds compared to compact alternatives
- Larger dimensions at 5.91 inches wide and deep
- Dual operation mode may require manual switching
Good fit if
- You need native support for PCIe 5.1 GPUs
- You prioritize high efficiency ratings like Cybenetics Platinum
- You want fully modular cables for clean builds
Skip if
- You require a compact SFX or smaller form factor
- You prefer a fan that runs silently at all loads
- You need automatic mode switching without manual input
Verdict: ASRock PG-850G Phantom Gaming 850W fits gamers who need modern PCIe 5.1 support and high efficiency. Its larger size and weight suit standard ATX cases with ample space.
ASRock PRO 850G 850W Gold PSU
Best for: Standard ATX builds needing gold efficiency
- Size
- 850W (what this guide is about)
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 120mm
View on Amazon: ASRock PRO 850G 850W Gold PSU Affiliate link
The ASRock PRO 850G delivers 850W of power with 80 PLUS Gold efficiency, reaching up to 90% under typical loads. It supports ATX 3.1 and PCIe 5.1 standards, featuring a native 12V-2x6 connector for modern graphics cards. The unit uses a 120mm fan for low-noise operation and fits standard ATX cases. It is a practical choice for builders needing reliable power delivery with a 3-year warranty.
Pros
- 80 PLUS Gold certification for up to 90% efficiency
- Native 12V-2x6 connector for PCIe 5.1 compatibility
- ATX 3.1 standard compliance
- 120mm fan for quiet cooling
Cons
- Shorter 3-year warranty compared to 10-year options
- 120mm fan is smaller than the 135mm fans in competitors
- Standard ATX size is bulkier than SFX alternatives
Good fit if
- You need a standard ATX power supply for most cases
- You want 80 PLUS Gold efficiency for lower heat
- You are building with PCIe 5.1 compatible components
Skip if
- You require a compact SFX form factor for small cases
- You prefer a longer warranty period than 3 years
- You want a larger 135mm fan for potentially quieter operation
Verdict: The ASRock PRO 850G 850W Gold PSU offers solid ATX 3.1 support and efficient power delivery for standard builds. It fits users who prioritize gold efficiency and native PCIe 5.1 connectors over compact sizing or extended warranty coverage.
Specifications side by side
| Spec | ASRock Steel Legend White 850W ATX 3.1 PSU | ASRock PG-850G 850W PSU | ASRock PRO 850G 850W Gold PSU |
|---|---|---|---|
| Wattage | 850W | 850W | 850W |
| Efficiency Rating | 80 PLUS Gold, Cybenetics Platinum | 80 PLUS Gold | 80 PLUS Gold |
| Modularity | Full Modular | Full Modular | not stated |
| ATX Version | ATX 3.1 | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | 12V-2x6 | 12V-2x6 | 12V-2x6 |
| Fan Size | 135 mm | 135 mm | 120mm |
| Warranty | 10 Years | 10 Years | 3-Year |
| Form Factor | ATX | not stated | ATX |
| PCIe Version | not stated | PCIe 5.1 | PCIe 5.1 |
| Recommended Use | not stated | Gaming | not stated |
| Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector |
| Size | 850W | 850W | 850W |
| Dimensions | 5.91 × 5.91 × 3.39 inches | 5.91 × 5.91 × 3.39 inches | 5.51 × 5.91 × 3.39 inches |
| Weight | 6.59 pounds | 7.8 pounds | not stated |
| Color | Multicolor | not stated | not stated |
| Model | SL-850GW | 90-UXP085-GFUAAB | 90-UXR085-GNUAA2 |
How to choose the right ASRock 850W PSU
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Verify ATX 3.1 Compliance
Ensure the unit supports ATX 3.1 standards. This version manages power delivery for modern components more effectively than older revisions. All three ASRock models listed here meet this requirement. This compliance helps maintain stable voltage under heavy loads. You should check the product specifications to confirm this version. It is a baseline requirement for any new build in 2026. Without it, you may face compatibility issues with newer motherboards or power states.
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Check 12V-2x6 Connector
Look for a native 12V-2x6 connector on the power supply. This connector replaces the older 12VHPWR interface and reduces the risk of melting or poor connections. Every ASRock 850W model in this guide includes this specific connector. It is designed for PCIe 5.1 graphics cards. You do not need extra adapters if the PSU has this port. Verify the connector is present in the specs. This feature simplifies your cable management and improves safety for high-end GPUs.
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Confirm 80 Plus Gold
Select a power supply with 80 Plus Gold efficiency certification. This rating means the unit converts at least 87% of AC power to DC power at typical loads. All three ASRock options in this list offer Gold efficiency. Higher efficiency reduces heat output and electricity costs over time. You save on energy bills during long gaming or work sessions. Check the efficiency rating in the attributes section. This spec is a key indicator of build quality and operational cost.
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Choose Fully Modular
Pick a fully modular power supply for cleaner cable management. Fully modular units allow you to connect only the cables you need. This reduces clutter inside your case and improves airflow. All three ASRock 850W models are fully modular. You can remove unused cables from the back of the unit. This makes installation easier in smaller cases. Verify the modularity type in the product attributes. It is a practical feature for maintaining a tidy and efficient system interior.
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Compare Physical Dimensions
Check the physical dimensions to ensure fit in your case. The Steel Legend and PG models measure 5.91 inches in length. The PRO model is slightly shorter at 5.51 inches. You need enough space in your chassis for the longest unit. Measure your case depth before purchasing. The height and width are standard for ATX units. Smaller length can help in compact builds. Review the specs table for exact measurements. This prevents installation problems after you buy the unit.
Frequently asked questions
Does the ASRock Steel Legend White 850W support ATX 3.1?
Yes, it supports ATX 3.1 standards. This version manages power delivery for modern components more effectively. It includes a 12V-2x6 connector for PCIe 5.1 GPUs. The unit weighs 6.59 pounds and measures 5.91 by 5.91 by 3.39 inches. It is suitable for standard ATX cases where weight is not a primary constraint.
Is the ASRock PG-850G fully modular?
Yes, the ASRock PG-850G is fully modular. This design allows you to connect only the cables you need, reducing clutter inside your case. It features 80 Plus Gold efficiency and supports PCIe 5.1 standards. The unit weighs 7.8 pounds and has dimensions of 5.91 by 5.91 by 3.39 inches. It is ideal for gaming builds.
What is the model number for the ASRock PRO 850G?
The model number for the ASRock PRO 850G is 90-UXR085-GNUAA2. It offers ATX 3.1 support and native PCIe 5.1 connectors. The unit provides 80 Plus Gold efficiency for reliable power delivery. Its dimensions are 5.51 by 5.91 by 3.39 inches. This makes it slightly more compact than other models in the lineup.
Which ASRock 850W PSU is the lightest?
The ASRock Steel Legend White 850W is the lightest option at 6.59 pounds. The PRO 850G does not list a weight in its specifications. The PG-850G weighs 7.8 pounds. All three models support ATX 3.1 and include 12V-2x6 connectors. The Steel Legend is a good choice if you prefer a lighter unit for your build.
Do all these models include a 12V-2x6 connector?
Yes, all three listed models include a 12V-2x6 connector. This connector is necessary for supporting PCIe 5.1 graphics cards. It ensures compatibility with the latest GPU power standards. Each unit also provides 80 Plus Gold efficiency. This combination of features makes them suitable for modern gaming and workstation builds requiring stable power delivery.
What efficiency rating do these ASRock power supplies have?
All three ASRock 850W models carry an 80 Plus Gold efficiency rating. This indicates high energy conversion efficiency during operation. Gold-rated units reduce wasted energy as heat. This helps lower electricity costs and improves system stability. Each model also features full modularity, allowing for cleaner cable management in your PC case.
Can the ASRock PRO 850G fit in small cases?
The ASRock PRO 850G measures 5.51 inches in length, making it slightly shorter than the other two models. However, it still follows the standard ATX form factor. You should verify your case dimensions before installation. It supports ATX 3.1 and includes a 12V-2x6 connector. It is designed for standard ATX builds rather than ultra-compact mini-ITX systems.