ASUS Prime 850W Gold Black Edition ATX 3.1 80 Plus Gold Fully Modular Power Supply
5838 EGP
- Power & Efficiency: 850W Output | 80 PLUS Gold Certified (Up to 92% Efficiency)
- Standards: ATX 3.1 Compatible | Includes 16-Pin PCIe Gen 5.1 Cable
- Design & Cooling: Fully Modular | Dual Ball Fan Bearings (Up to 80,000 Hours Lifespan) | Reversible Two-Tone Housing
- Warranty: 8 Years
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ASUS Prime 850W Gold Black Edition ATX 3.1 80 Plus Gold Fully Modular Power Supply
ASUS Prime 850W Gold Black Edition is a fully modular power supply with 850W continuous output, 80 PLUS Gold and Cybenetics Gold certification, and ATX 3.1 compliance. Because it supports PCIe 5.1 graphics cards with a bundled 16-pin 12V-2×6 cable, it delivers up to 600W to modern GPUs. In addition, it uses a 135mm dual-ball bearing fan and includes an 8-year warranty. Available at Alfrensia for 5,499 EGP.
⚡ Engineering Highlights at a Glance:
- 850W Total Output: Provides continuous power for high-end gaming rigs and workstations with a single high-wattage GPU.
- 80 PLUS Gold & Cybenetics Gold: Delivers up to 92% efficiency, which reduces heat output, fan noise, and long-term energy cost.
- ATX 3.1 & PCIe 5.1 Compatible: Handles total power excursions up to twice the rated power and GPU excursions up to three times the rated power.
- Fully Modular Design: Only connect the cables you need, which improves airflow and simplifies cable management.
- Bundled 16-Pin 12V-2×6 Cable: Delivers up to 600W to PCIe 5.1 graphics cards such as GeForce RTX 50 and Radeon RX 9000 series.
- Dual-Ball Bearing Fan: The 135mm fan lasts up to twice as long as a sleeve bearing design and handles higher temperatures.
- 8-Year Warranty: Reflects the reliability of the design and the quality of the components used.
Efficiency and Certification
The Prime 850W Gold is certified 80 PLUS Gold and Cybenetics Gold. Because it uses low-ESR capacitors and other premium components, it delivers up to 92% efficiency. Higher efficiency means less power is wasted as heat, which keeps the interior cooler and reduces fan noise. In addition, Cybenetics testing measures both efficiency and noise, giving the Gold rating confidence in both dimensions. This makes the PSU suitable for systems that run for long hours, whether for gaming, content creation, or office use.
ATX 3.1 and PCIe 5.1 Ready
The Prime 850W Gold meets the stringent requirements of the ATX 3.1 standard and supports PCIe 5.1 graphics cards. Because ATX 3.1 requires the PSU to handle power excursions beyond its rated output, the Prime 850W Gold can sustain total power excursions up to twice the rated power and GPU excursions up to three times the rated power. This ensures stability during transient spikes that modern high-end GPUs generate. The bundled 16-pin 12V-2×6 cable carries up to 600W to the GPU, which is enough for cards like the GeForce RTX 50 series and Radeon RX 9000 series. For proper connection, insert the 16-pin cable fully until it latches, and avoid bending it sharply near the connector.
Premium Etched Cables
The bundled cables use a premium etched jacket, which is more flexible than standard sleeved cables. Because the cables are easy to bend and route, cable management is simpler, and the interior stays cleaner. In addition, the cables use tin-plated oxygen-free copper, which offers ultra-high conductivity, low resistance, and low heat generation. Under load, the cables run well below their thermal limits, and they meet the UL1581 flame test and UL758 certification for safety. The fully modular design means you can leave unused cables in the box, which further reduces clutter and improves airflow.
Cooling and Durability
A 135mm fan cools the PSU internals, and it uses dual-ball bearings instead of a sleeve bearing. Because ball bearings handle higher temperatures and last longer than sleeve bearings, the fan lifespan is up to twice as long. This matters for PSUs that run continuously, since replacing a fan is not practical for most users. In addition, the upgraded PCIe connectors use superior copper pins that run up to 29% cooler than standard designs, which helps maintain stable power delivery to the GPU over time.
Protection Features
The Prime 850W Gold includes a full set of protection mechanisms: Over-Current Protection (OCP), Over-Temperature Protection (OTP), Over-Voltage Protection (OVP), Over-Power Protection (OPP), Short Circuit Protection (SCP), and Under-Voltage Protection (UVP). Because these protections are built into the PSU, it shuts down safely if a fault occurs, which helps protect the rest of the system from damage. The PSU also complies with RoHS, which means it does not contain restricted hazardous substances.
Who is the ASUS Prime 850W Gold For?
Expert Advice & Build Considerations
Verify Total System Power Draw
Before purchasing, estimate your total system power draw. An 850W PSU is suitable for most single-GPU builds, including those with a high-end CPU and a flagship GPU. For dual-GPU systems or systems with many drives and expansion cards, consider a higher-wattage unit. Use a PSU calculator to estimate peak load, and leave 20–30% headroom above that estimate.
16-Pin Cable Installation
The bundled 16-pin 12V-2×6 cable carries up to 600W, so it must be fully seated to avoid overheating. Push the connector in straight until it clicks or latches. Avoid sharp bends near the connector, and leave enough slack so the cable is not under tension. Follow the instructions in the user manual and on ASUS support pages for proper 16-pin cable usage.
📐 Case Fit and Airflow
The PSU measures 150 x 150 x 86 mm, which is a standard ATX form factor. Confirm your case supports ATX PSUs of this size. For best cooling, mount the PSU with the fan facing downward if your case has a bottom intake vent, or with the fan facing upward if the case has a top-mounted PSU position with a vent above. Route the modular cables behind the motherboard tray where possible, and leave the interior clear for airflow.
Technical Specifications
| Model | PRIME-850G |
| Brand | ASUS |
| SKU / MPN | 90YE00U2-B0NA00 |
| EAN | 199291288195 |
| Total Output | 850W |
| Form Factor | ATX12V |
| ATX Standard | ATX 3.1 |
| 80 PLUS Efficiency | 80 PLUS Gold |
| Cybenetics Efficiency | Gold (230V) ; Gold (115V) |
| Modularity | Fully Modular |
| AC Input Range | 100-240 Vac |
| DC Output Voltage | +3.3V, +5V, +12V, -12V, +5Vsb |
| Maximum Load | 20A (3.3V), 20A (5V), 70.5A (12V), 0.3A (-12V), 2.5A (5Vsb) |
| Combined Load | 110W (3.3V+5V), 846W (12V), 3.6W (-12V), 12.5W (5Vsb) |
| Protection Features | OPP / OVP / UVP / SCP / OCP / OTP |
| PCIe 5.1 Support | Yes (Bundled 16-pin 12V-2×6 cable) |
| Fan | 135mm Dual-Ball Bearing |
| MTBF | >120,000 hours @ 25°C |
| Dimensions | 150 x 150 x 86 mm |
| Weight | 1.48 kg (single PSU) |
| Cable Connectors | MB 20+4pin x1, CPU 4+4pin x2, PCI-E 16pin x1 (12V-2×6), PCI-E 6+2pin x3, SATA x5, PERIPHERAL x4 |
| Warranty | 8 Years |
Expert Recommendation: Getting the Most from Your ASUS Prime 850W Gold
Before building, estimate your system’s peak power draw and confirm 850W provides enough headroom. For a single high-end GPU with a modern CPU, 850W is usually sufficient. Connect the 16-pin 12V-2×6 cable to the GPU only if your card uses that connector, and push it in straight until it latches. Route the modular cables behind the motherboard tray and leave the unused cables in the box. Because the PSU uses a dual-ball bearing fan, it may be slightly louder at low load than a fanless or sleeve-bearing model, but the trade-off is a longer lifespan and better heat tolerance. Mount the PSU with the fan facing the case intake vent if one exists. Clean the PSU fan filter periodically to prevent dust buildup, which can increase fan speed and noise. Use the included 8-year warranty as a reason to buy with confidence, and keep the receipt for any future claim.
Frequently Asked Questions
What is ATX 3.1, and why does it matter?
ATX 3.1 is a power supply standard that requires the PSU to handle brief power excursions above its rated output. Because modern GPUs can draw short bursts of power well above their average consumption, an ATX 3.1-compliant PSU is more stable with these cards than an older ATX 2.x unit.
Is the bundled 16-pin cable compatible with my GPU?
The bundled 16-pin 12V-2×6 cable is compatible with PCIe 5.1 graphics cards that use the 12V-2×6 or 12VHPWR connector. If your GPU uses 8-pin PCIe connectors instead, use the bundled PCIe 6+2pin cables. Confirm your GPU’s power connector type before installation.
Does the Prime 850W Gold have a zero-RPM fan mode?
No. This model does not include 0dB technology, so the fan always spins at a low minimum speed. The dual-ball bearing design runs quietly, but if absolute silence at idle is a priority, consider a PSU with a 0dB mode.
What does the 80 PLUS Gold certification mean?
80 PLUS Gold certification indicates the PSU delivers at least 87% efficiency at 20% load, 90% at 50% load, and 87% at 100% load. Higher efficiency means less power is wasted as heat, which reduces cooling requirements and long-term electricity cost.
What warranty does this PSU come with?
The ASUS Prime 850W Gold includes an 8-year warranty. Keep your purchase invoice for warranty claims, and register the product on the ASUS website to simplify future support requests.
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Warranty & Purchase Terms
- Warranty period: the manufacturer's warranty period, from one month up to 3 years.
- Immediate replacement: if a manufacturing defect appears at any time during the warranty, the product is replaced with a new one, no repair (except products that need software work). If no replacement is available, you get a full refund with no deductions.
- Returns: within 30 days of purchase, if the product is in the same condition with all its contents.
- Receiving your order: check the shipment on delivery; if anything is damaged or missing, contact us within 24 hours and keep the box and photos.
- Not covered: misuse (burning, breaking, scratching, removing the warranty sticker), operating systems, software and generic accessories.
- Important: keep the Alfrensia warranty sticker on the product and all box contents to benefit from the agent's warranty.
- Payment & delivery: cash on delivery. Cairo, Giza & Alexandria within 1–3 business days, other governorates within 3–6 business days after order confirmation.
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