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NZXT C850 Gold Core ATX 3.1 850W 80 Plus Gold Fully Modular Black Power Supply
NZXT C850 Gold Core is an 850W fully modular ATX 3.1 power supply rated 80 PLUS Gold and Cybenetics Platinum, with a Cybenetics A++ noise rating. It includes one 600W 16-pin 12V-2x6 PCIe 5.1 cable, three 8-pin PCIe cables, a 135mm fluid dynamic bearing fan with Zero RPM Mode, and 105°C-rated capacitors. Available at Alfrensia for 6,939 EGP.
⚡ Engineering Highlights at a Glance:
- 850W ATX 3.1: Compliant with ATX12V v3.1 and EPS12V v2.92, delivering stable power for modern GPUs and CPUs.
- 600W 12V-2x6 Connector: Native PCIe 5.1 cable with a dual-color housing that shows when the connector is fully seated.
- 80 PLUS Gold / Cybenetics Platinum: Up to 92.1% efficiency at 50% load, reducing heat and power waste.
- Cybenetics A++ Noise: Rated under 15 dBA, with Zero RPM Mode stopping the fan at low loads for near-silent operation.
- 135mm FDB Fan: Fluid dynamic bearing design delivers 103.36 CFM airflow while keeping noise down.
- 105°C-Rated Capacitors: Premium components for stable, long-lasting performance under heavy loads.
- Fully Modular with Embossed Cables: Connect only the cables you need, with cable combs included for a clean build.
Who is the NZXT C850 Gold Core For?
Expert Advice & Build Considerations
GPU Connector Planning
The C850 Gold Core includes one 600W 16-pin 12V-2x6 cable with a dual-color housing that shows when the connector is fully seated, plus three 8-pin (6+2) PCIe cables. Check your GPU's power connectors before purchase; if it needs two 12V-2x6 cables, this PSU supplies only one and would require an adapter or a different PSU. For cards that need up to three 8-pin connectors, the three included PCIe cables cover that scenario.
Case Fit and Cable Routing
The PSU measures 150 x 86 x 150mm, which is shorter than many 160mm and 180mm units. This leaves more room for cable routing in mid-tower and compact cases, but you should still confirm the PSU bay depth and cable exit clearance. The fully modular design lets you connect only the cables you need; because the cables are individually embossed with combs, they can be routed neatly behind the motherboard tray. Plug in the 24-pin, 4+4-pin CPU, and 8-pin CPU cables first to simplify routing.
Fan Mode and Efficiency
The 135mm fluid dynamic bearing fan uses Zero RPM Mode, staying off at low loads for silent operation. Below light workloads the PSU runs passively, which suits quiet idle and desktop use. At full speed the fan reaches 40.5 dBA, which is audible but normal for an 850W unit under load. Keep the PSU intake clear of cables and dust filters. The unit is rated to operate at 0–50°C continuous full load, so it holds up in hot climates with proper case airflow.
Technical Specifications
| Model Name | C850 Gold Core |
| Brand | NZXT |
| SKU / MPN | PA-8G3BB-UK |
| EAN / UPC | 810074849180 |
| Product Type | ATX 3.1 power supply |
| Wattage | 850 W |
| Efficiency Rating | 80 PLUS Gold | Cybenetics Platinum | Cybenetics A++ Noise (<15 dBA) |
| ATX Version | ATX 3.1 (ATX12V v3.1 / EPS12V v2.92) |
| Modularity | Fully modular (embossed cables with combs) |
| Dimensions | 150 x 86 x 150 mm |
| Weight | 1.638 kg |
| Capacitors | 105°C-rated performance capacitors |
| GPU Connectors | 1 x 16-pin (12+4) 12V-2x6 PCIe 5.1 (600W) | 3 x 8-pin (6+2) PCIe |
| Cable Lengths | 24-pin 600 mm | 4+4-pin CPU 700 mm | 8-pin CPU 700 mm | 6+2 PCIe 650 mm | 12V-2x6 650 mm | SATA 500+100 mm | Peripherals 500+100 mm |
| AC Input | 100 – 240 Vac, 10 – 5 A, 50 – 60 Hz |
| DC Output (+12V) | 70.8 A (850 W) |
| DC Output (+3.3V / +5V) | 20 A each (120 W combined) |
| DC Output (5VSB) | 3 A (15 W) |
| Efficiency | 87% @ 10% | 91.58% @ 20% | 92.1% @ 50% | 89.33% @ 100% (at 115V) |
| Fan | 135 mm PWM, Fluid Dynamic Bearing, 2,300 ± 10% RPM, 103.36 CFM, 40.5 dBA |
| Fan Mode | Zero RPM Mode at low load |
| Protections | OVP, UVP, SCP, OTP, OPP, OCP |
| Power Factor Correction | Active @ 0.99 |
| MTBF | 100,000 hours |
| Operating Temperature | 0 – 50 °C (continuous full load) |
| Regulation & Certifications | CE, UKCA, FCC, IC, BSMI, CB (IEC 62368-1 Ed. 3), RCM, KC |
| Included Cables | 24-pin ATX | 4+4-pin CPU | 8-pin CPU | 6+2-pin PCIe (3) | 16-pin 12V-2x6 PCIe (1, 600W) | SATA (8 connectors across 2 cables) | Peripherals (3 connectors) | AC power cord | Cable combs |
| Warranty | 7 Years Local Alfrensia Warranty |
Expert Recommendation: Building with the NZXT C850 Gold Core
Check your GPU's power connectors before ordering. The C850 Gold Core includes one 600W 12V-2x6 cable and three 8-pin PCIe cables, which covers most single-GPU builds. If your GPU needs two 12V-2x6 cables, choose a higher-wattage NZXT model like the C1200 Gold or C1500 Platinum instead.
Plug in the 24-pin, 4+4-pin CPU, and 8-pin CPU cables first, then add only the PCIe, SATA, and peripheral cables you need. The fully modular design keeps the PSU bay tidy and improves airflow, and the embossed cables with combs make routing easier behind the motherboard tray.
Use the dual-color housing on the 12V-2x6 connector to confirm a fully seated connection before powering on. Route the cable with gentle bends and keep it clear of sharp edges and hot components, and check that the connector latch clicks into place.
Take advantage of Zero RPM Mode for quiet idle operation by keeping the PSU intake unobstructed and using a case with reasonable airflow around the PSU bay. The unit is rated for 0–50°C continuous full load, so it holds up in warm climates. The 7-year warranty backs the build quality, so keep your receipt and register the PSU if required.
Frequently Asked Questions
Does this PSU use 100% Japanese capacitors?
No. The C850 Gold Core uses premium capacitors from Taiwan, a region known for world-class manufacturing. Each unit is tested to ensure stable power and long-lasting reliability, even under demanding use. The capacitors are rated to 105°C for higher thermal endurance than standard 85°C components.
How do I know which PSU wattage I need for my build?
The right wattage depends on your CPU and GPU. Too little power can cause stability issues, while too much means paying for capacity you may never use. For best efficiency, choose a power supply that is roughly double your system's peak load. Use a power supply calculator that includes your CPU, GPU, drives, and fans to estimate peak draw.
Is the C850 Gold Core compatible with the latest GPUs and CPUs?
Yes. It is ATX 3.1 and PCIe 5.1 compliant, with a 600W 12V-2x6 connector for modern NVIDIA and AMD GPUs. It also includes three 8-pin PCIe cables for older cards and all standard connectors for the latest Intel and AMD CPUs.
How quiet is the C850 Gold Core?
It carries a Cybenetics A++ noise rating, which corresponds to under 15 dBA, and Zero RPM Mode stops the fan at low loads for silent operation. At full speed, the 135mm fan reaches 40.5 dBA, which is audible but normal for an 850W unit under load.
What protections does the C850 Gold Core include, and what is the warranty?
It includes OVP (over-voltage), UVP (under-voltage), SCP (short-circuit), OTP (over-temperature), OPP (over-power), and OCP (over-current) protections. The PSU is backed by a 7-year warranty from Alfrensia.


















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