Asrock PRO-850B 850W ATX PSU Black

Asrock PRO-850B – reliable 850W power delivery

We supply the Asrock PRO-850B power supply unit 850 W 24-pin ATX ATX Black to system builders who need steady, efficient power. This unit suits PC builders upgrading mid-range graphics cards and multi-drive setups. Its strongest benefit is dependable 850W output with full safety coverage. Because it uses a 24-pin ATX motherboard connector, installation stays straightforward.

Core numbers

Native PCIe 12V-2×6 for modern graphics

We include a native 12V-2×6 PCIe cable, so you can connect newer graphics cards without adapters. This keeps build clean and reduces connection points that can fail. Because the cable is built in, you get a direct, secure feed to high-power GPUs. In practice, cable management stays simple even in compact cases.

Dual colour connectors for confident builds

We use ASRock Classic Green connectors to make verification easy at a glance. The colour clearly shows when each plug is fully seated. So you reduce the risk of loose connections during assembly. This small detail helps both new and experienced builders finish with confidence.

Active 12 cm cooling with strong airflow

We specified a single 12 cm fan for active cooling that balances noise and thermal performance. The fan draws heat away from key components under load. Because the unit measures 150 mm width, 140 mm depth and 86 mm height, it fits many standard ATX cases. However, always check your case clearance before ordering.

Comprehensive protection suite

We protect your build with over current, short circuit, over voltage, under voltage, overheating and over power safeguards. These features help keep components safe during normal and extreme loads. So your system can handle sudden demand spikes without worry. The unit is designed for long-term reliable operation.

Wide AC input range for UK setups

We support 100–240 V AC input at 50/60 Hz, suiting UK mains without fuss. The input current range supports typical home circuits. Because the PSU is non-modular, the cables are fixed for straightforward installation. This design keeps cost effective while maintaining solid performance.

What you receive

• Asrock PRO-850B power supply unit
• Fixed cable set with 24-pin ATX, CPU 4+4 pin, PCIe 12V-2×6, SATA and peripheral leads
• Mounting screws
• User documentation

Before you order

• Confirm your case supports standard ATX PSU dimensions and clearance
• Check your motherboard has a 24-pin ATX and 4+4 pin CPU connector
• Verify your graphics card requires a 12V-2×6 or 6+2 pin PCIe lead
• Ensure your mains socket matches UK three-pin standard

Frequently Asked Questions

Q: Is the Asrock PRO-850B power supply unit 850 W 24-pin ATX ATX Black suitable for UK builds?

A: Yes, it accepts 100–240 V input and suits standard UK mains sockets.

Q: Does this PSU include a 12V-2×6 cable for modern GPUs?

A: Yes, it includes one native 12V-2×6 PCIe cable for direct connection.

Q: Are the cables modular?

A: No, this model uses a non-modular cable design for straightforward installation.

Q: What protections are included?

A: It covers over current, short circuit, over voltage, under voltage, overheating and over power.

Q: How long is the warranty?

A: ASRock provides a 3-year warranty on this unit.

Our verdict

We recommend the Asrock PRO-850B for builders who need reliable 850W power with modern GPU support. It suits mid-range to high-end systems that value safety and straightforward installation. The 3-year warranty offers long-term peace of mind. If you want a dependable base for a UK PC build, this unit fits the brief.