ASRock PRO-850G 850W 80 Plus Gold ATX 3.1 PSU
ASRock
ASRock PRO-850G 850W 80 Plus Gold ATX 3.1 PSU
The ASRock PRO-850G is an 850W power supply built for PC builders who need reliable 80 Plus Gold efficiency and support for modern ATX 3.1 and PCIe 5.1 components. It combines native 12V-2x6 connectors with comprehensive protections and a 3-year warranty, making it a straightforward choice for mid-range to high-end builds.
Why this product
80 Plus Gold efficiency
Delivers 80% or higher efficiency across most load conditions, reducing wasted power and heat compared to Bronze or Silver units.
ATX 3.1 and PCIe 5.1 ready
Native 12V-2x6 connectors and dual-color PCIe 5.1 12+4pin ports support next-generation components without adapters.
Compact 140mm chassis
At 140 x 150 x 86 mm, it fits into smaller or tightly packed cases where full-size PSUs would be difficult to install.
Low-noise 120mm fan
Single fan design prioritizes quiet operation during normal workloads while maintaining adequate cooling capacity.
Full protection suite
OCP, SCP, OVP, UVP, OTP, and OPP safeguard against overload, short circuit, voltage spikes, and thermal runaway.
3-year warranty
Covers defects and failures across the full warranty period, backed by ASRock's standard terms.
- Power output850W
- Efficiency rating80 Plus Gold
- Form factorATX 3.1
- Fan size120mm
- Warranty3 years
- Continuous 12V output70.8 A
- MTBF @ 25°C100,000 hours
- SKUASR-3346
- EAN4711581491441
- Fits ATX 3.1 motherboards and works with native 12V-2x6 CPU power connectors without adapters.
- Supports PCIe 5.1 graphics cards via dual-color 12+4pin connectors, eliminating legacy adapter requirements.
- Provides two 6+2pin PCIe connectors for dual-GPU setups or single high-power graphics cards.
- Single 24-pin motherboard connector suits standard ATX form factor boards; mini-ITX or SFX boards may require different PSU sizes.
- Lacks iCOOL MODE and PCIe 5.1 Cable TempGuard features; these are not required for standard operation but are absent compared to higher-tier models.
Best for
- Mid-range to high-end gaming and workstation builds
- Builders upgrading to ATX 3.1 or PCIe 5.1 components
- Systems prioritizing long-term efficiency and lower electricity bills
- Compact or SFF cases where form factor and cooling noise matter
- Users who value protection features and multi-year warranty coverage
Trade-offs
- Budget builds under $1000 — the 850W capacity and Gold efficiency carry a price premium suited to higher-spec systems.
- Extreme overclocking with multiple high-end GPUs — 850W is adequate for dual-GPU only in carefully balanced setups; enthusiasts often prefer 1000W+.
- Fanless or near-silent operation — a 120mm fan will run audibly under load, even if noise is low by standard PSU measures.
- Mini-ITX or ITX motherboards — the single 24-pin connector and larger envelope suit ATX form factors, not smaller boards.
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 Gold 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-850G |
| Power output | 850W |
| Efficiency rating | 80 Plus Gold |
| ATX version | ATX 3.1 |
| PCIe support | PCIe 5.1 |
Power & Connectivity
| AC input | 100–240V~, 50–60Hz, 12–6A |
|---|---|
| Continuous 12V output | 70.8 A |
| 24-pin motherboard connectors | 1 |
| EPS 12V CPU (4+4pin) connectors | 1 |
| PCIe 5.1 (12+4pin) connectors | 1 |
| PCIe (6+2pin) connectors | 2 |
| 4-pin peripheral connectors | 2 |
| SATA connectors (5-pin) | 4 |
| Cable type | Flat |
Cooling & Protection
| Fan size | 120mm |
|---|---|
| iCOOL MODE | No |
| Protections | OCP, SCP, OVP, UVP, OTP, OPP |
| Capacitor type | All Taiwanese |
| PCIe 5.1 Cable TempGuard | No |
Physical & Warranty
| Dimensions (L × W × H) | 140mm × 150mm × 86mm |
|---|---|
| MTBF @ 25°C | 100,000 hours |
| Warranty | 3 years |
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.