GameMax GX-850 PRO 850W ATX Power Supply

GameMax GX-850 PRO | 850W ATX3.1 Gold PSU with PCIe5.1

The GameMax GX-850 PRO power supply unit 850 W 20+4 pin ATX ATX White delivers 850W of clean, efficient power with 80 PLUS Gold certification and ATX3.1 compliance. Designed for high-performance gaming PCs, it features a PCIe5.1 12V-2*6 connector for direct RTX™ 40 Series GPU connection, minimising current loss and maximising stability.

Key Specifications

Direct RTX™ 40 Series GPU Connection

The GX-850 PRO includes a PCIe5.1 12V-2*6 connector specifically engineered for next-generation graphics cards. This dedicated connector reduces current loss compared to traditional PCIe cables, ensuring your RTX™ 40 Series GPU receives stable, clean power for optimal performance during intensive gaming sessions.

Fully Modular Cable Management

With fully-modular cabling, you connect only the cables your build requires. This reduces clutter inside your case, improves airflow, and makes installation cleaner. The included cables feature lengths of 65 cm for motherboard, 15 cm for CPU, and SATA cables at 500/650/800 mm for flexible routing options.

High-Efficiency Power Delivery

Achieving 87% efficiency under typical loads, the 80 PLUS Gold certification means less wasted energy and lower operating temperatures. The active Power Factor Correction (PFC) with a 0.99 power factor ensures your system draws power efficiently from the mains, reducing electricity costs and environmental impact.

Robust Protection and Reliability

Built with comprehensive protection features including over current, over power, surge & inrush protection (SIP), and under power safeguards. The 100,000-hour MTBF rating demonstrates exceptional reliability for continuous operation, while the 10 ms hold time maintains power during brief interruptions.

Box Contents

• GameMax GX-850 PRO power supply unit
• Fully modular cables (as specified)
• User manual
• Mounting screws

Check before you buy

• Confirm your PC case supports standard ATX power supply dimensions (160 x 150 x 85 mm)
• Verify your GPU requires PCIe5.1 connectivity or will use standard PCIe connectors
• Check your system’s total power draw against the 850W capacity
• Ensure your location’s voltage (100-240V) matches the PSU’s input range

Frequently Asked Questions

Q: Does this PSU support Intel ATX3.1 specification?

A: Yes, the GX-850 PRO complies with ATX3.1 standard and includes PCIe5.1 12V-2*6 connector.

Q: How many PCIe 6+2 pin connectors are included?

A: The PSU includes four PCIe 6+2 pin connectors for graphics card power.

Q: What is the noise level during operation?

A: The 13.5 cm fan operates at 25 dB, providing quiet cooling performance.

Q: Is the power supply fully modular?

A: Yes, all cables are fully modular for customisable cable management.

Q: What protection features does this PSU have?

A: It includes over current, over power, surge & inrush protection, and under power protection.

The Consultant’s verdict & warranty

The GameMax GX-850 PRO power supply unit 850 W 20+4 pin ATX ATX White represents excellent value for gamers building high-performance systems with RTX™ 40 Series GPUs. Its ATX3.1 compliance, PCIe5.1 connectivity, and 80 PLUS Gold efficiency make it future-proof for demanding components. Covered by the standard Manufacturer Warranty.