ASRock Phantom Gaming PG-850G 850W 80+ Gold Fully Modular PSU
ASRock
ASRock Phantom Gaming PG-850G 850W 80+ Gold Fully Modular PSU
The ASRock Phantom Gaming PG-850G 850W 80+ Gold Fully Modular PSU is built for gaming system builders who need a high-wattage, forward-compatible power supply that handles demanding GPU loads without compromise. It delivers 850W of fully modular power with ATX 3.1 and PCIe 5.1 compliance, meaning it is ready for current high-end graphics cards and the next generation of components. A 10-year warranty and dual noise-reduction certifications make it a strong long-term investment for a primary rig.
Why this product
ATX 3.1 and PCIe 5.1 ready
Fully compliant with ATX12V V3.1 and PCIe Gen 5.1 standards, it supports a native 12V-2x6 GPU connector and can absorb up to 220% power excursion, protecting components during sudden GPU power spikes.
80 PLUS Gold plus Cybenetics Platinum
It carries both 80 PLUS Gold efficiency certification and independent Cybenetics Platinum and LAMBDA A+ acoustic ratings, confirming high efficiency and low operating noise under measured conditions.
iCool fan stays silent under light loads
With iCool Mode enabled, the 135mm FDB fan remains off during low to medium loads, reducing noise. It only spins up when the load or temperature rises, so the unit is quieter during everyday use.
Fully modular for clean cable management
Every cable is detachable, so only the connectors actually needed in a build have to be routed, reducing clutter and improving airflow inside the chassis.
Dual-colour GPU connector with TempGuard
The native 12V-2x6 connector uses a two-colour design so users can visually confirm it is fully seated, while a built-in NTC temperature sensor monitors the connector and signals the PSU if heat rises unexpectedly.
10-year warranty
ASRock backs this unit with a 10-year warranty, one of the longest in the consumer PSU segment, providing genuine long-term coverage alongside the unit's 100% Japanese capacitors.
- Wattage850W
- Efficiency80 PLUS Gold
- Cybenetics RatingPlatinum & LAMBDA A+
- ModularFully Modular
- Form FactorATX
- GPU ConnectorNative 12V-2x6 (12+4pin)
- Warranty10 Years
- Power ExcursionUp to 220%
- SKUASR-764
- EAN4710483948503
- Fits standard ATX cases — uses the ATX form factor.
- Works with current-generation GPUs requiring a 12V-2x6 (12+4pin) connector, supplied natively on this unit.
- Supports PCIe 5.1 graphics cards and ATX 3.1 motherboards directly.
- Connects to older GPU designs via the four included PCIe 6+2pin cables.
- Cybenetics certification badge may be absent from earlier packaging units; the official Cybenetics website reflects the current certification status.
- Not intended for SFX, SFX-L or TFX small-form-factor cases — ATX dimensions only.
Best for
- High-end gaming builds with power-hungry PCIe 5.1 GPUs that benefit from the native 12V-2x6 connector and 220% power excursion headroom.
- Noise-sensitive setups where the iCool zero-RPM mode and Cybenetics LAMBDA A+ acoustic certification matter for a quiet desktop environment.
- Long-term or flagship builds where the 10-year warranty and 100% Japanese capacitors justify the investment in reliability.
- Builders who prioritise clean wiring, since the fully modular design means unused cables stay out of the chassis entirely.
- Future-proofing a system for next-generation components, given ATX 3.1 and PCIe 5.1 compliance.
Trade-offs
- Small-form-factor builds — the ATX form factor means it will not physically fit SFX or TFX enclosures.
- Budget or office systems that draw well under 850W and have no need for PCIe 5.1 or the advanced connector set included here.
- Workstation or server environments that require redundant power supplies or hot-swap capability, which this consumer ATX unit does not offer.
- Builders wanting a constantly active fan in iCool Mode ON by default — in that mode the fan stays off at low loads, which some users may find counter-intuitive without reading the manual.
The ASRock Phantom Gaming series power supply supports both current and future standards, fully compliant with ATX12V V3.1 and PCIe Gen 5.1. Ideal for both current systems and future builds, this power supplies can handle up to 220% power excursion and respond swiftly to power spikes, ensuring reliable, safe power for your components.
With ASRock Classic Green connectors, users can easily see if the connector has been plugged properly. The NTC sensor at the VGA connector monitors the temperature and sends signal the PSU to ensure safe operation.
When this switch is enabled, it boosts the +5V voltage to maintain optimal performance. If no voltage drop occurs, the PSU will regulate the +5V rail to approximately +5.15V, ensuring consistent power delivery.
iCOOL Mode ON: The power supply runs more efficiently. The fan stays off during low to medium loads, reducing noise and improving energy efficiency. The fan only activates when the load or temperature increases.
iCOOL Mode OFF: The fan runs continuously, regardless of load. This may increase noise slightly but provides consistent cooling and better performance under heavy loads.
Designed for gaming enthusiasts, the Phantom Gaming series power supply unit with 80 PLUS Gold efficiency certification and Cybenetics Platinum & Gold ratings, along with LAMBDA A acoustic certification, it guarantees superior energy efficiency and low noise operation.
The Phantom Gaming series power earning the prestigious Cybenetics Lambda A+ certification. This recognition underscores the Phantom Gaming series' outstanding noise control performance, making it an exceptional choice for users seeking ultra-quiet operation.
The fluid seal design and the herringbone structure provides an extremely long lifespan and noise minimization. The industrial-leading components deliver high efficiency and reliability. Full suite of protections to keep all components safe during normal to extreme power levels.
ASRock offers an outstanding 10-Year warranty, guaranteeing long term reliable and peace of mind operation.
*The Cybenetics certification on the packaging has been updated. Some earlier units may not show the badge. For the latest certification details, please visit the official Cybenetics website. Product specifications and performance remain unchanged.
The specification is subject to change without notice in advance. The brand and product names are trademarks of their respective companies. Any configuration other than original product specification is not guaranteed. The above user interface picture is a sample for reference.
This model may not be sold worldwide. Please contact your local dealer for the availability of this model in your region.
General
| Brand | ASRock |
|---|---|
| Model | PG-850G |
| Form Factor | ATX |
| Wattage | 850W |
| Warranty | 10 Years |
Efficiency & Certifications
| 80 Plus Rating | Gold |
|---|---|
| Cybenetics Efficiency | Platinum |
| Cybenetics Acoustic | LAMBDA A+ |
| ATX Version | ATX 3.1 |
| PCIe Version | PCIe 5.1 |
Connectors
| Motherboard | 1 x 24pin |
|---|---|
| CPU / EPS | 2 x EPS 12V (4+4pin) |
| Native GPU (PCIe 5.1) | 1 x 12V-2x6 (12+4pin) Dual Colour with TempGuard |
| PCIe | 4 x PCIe (6+2pin) |
| SATA | 9 x SATA 5-pin |
| Peripheral | 3 x 4-pin Peripheral |
Cooling & Components
| Fan | 135mm Striped Axial FDB Fan |
|---|---|
| Fan Control | iCool Intelligent Fan Control Mode |
| Capacitors | 100% Japanese Capacitors |
| 5V Boost Mode | Yes |
| Power Excursion Support | Up to 220% |
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.