Overview

The PCCOOLER CPS KN850 is a fully modular ATX power supply designed for modern PC builds. It delivers 850W of rated output and carries 80 PLUS Gold certification, which speaks to its efficiency under typical load conditions. The unit complies with the Intel ATX 3.1 specification and features a PCIe 5.1 interface, making it a sensible choice for systems built around current-generation graphics cards.
What sets this PSU apart is its fully modular cabling, which lets you connect only the cables you actually need and keeps the inside of your case tidy. Inside, the unit uses Japanese bulk capacitors and capacitors rated for 105°C, supporting stable operation over the long term. Cooling is handled by a 120mm hydraulic bearing fan with thermal control that adjusts the balance between cooling performance and noise according to load.
In the broader market, the CPS KN850 sits in the mid-range tier. It combines 80 PLUS Gold efficiency with ATX 3.1 and PCIe 5.1 support at a price point that remains accessible, which makes it an attractive option for builders who want modern features without stepping up to premium flagship pricing.

Compatibility Guide

The CPS KN850 uses the standard ATX form factor, so it fits into most mid-tower and full-tower cases that support ATX power supplies. Because the cabling is fully modular, you can attach only the cables your build requires, which also helps maintain good airflow inside the chassis.
Included cables consist of one 24-pin motherboard cable, two 8-pin CPU cables, three 8-pin PCIe cables, two 4-pin peripheral cables, one SATA cable set, one 12V-2x6 cable, and an AC power cord. The native 12V-2x6 cable allows direct PSU-to-GPU power delivery for compatible graphics cards. The unit accepts 100-240V AC input, so it works across different regions, though you should use the region-specific power cord that comes in the box. For all connections, use only the modular cables included with this PSU.

Product Info

The PCCOOLER CPS KN850 (model P3-KN850-G1F) is an 850W fully modular ATX power supply with 80 PLUS Gold certification. It complies with the Intel ATX 3.1 standard and includes a PCIe 5.1 interface. Physical dimensions are approximately 140mm deep, 150mm wide, and 86mm tall, which fits within the space provided by typical ATX cases.
Its market position is mid-range. The unit pairs 80 PLUS Gold efficiency with support for the latest ATX 3.1 and PCIe 5.1 standards while staying at a comparatively approachable price. The use of Japanese capacitors also reflects a focus on build quality that is noteworthy in this class.

Best Use Cases

  • Gamers building a new PC around a current-generation graphics card. The included native 12V-2x6 cable provides a direct PSU-to-GPU connection, which is exactly what modern GPUs expect. If you are still running an older PSU without this connector, this is a strong upgrade candidate.
  • Builders who care about cable management and internal airflow. The fully modular design means unused cables stay out of the case entirely, making for a cleaner build. If you never open your case after assembly, this advantage matters less to you.
  • Users who want a power supply that can handle long-term use. Japanese 105°C-rated capacitors support stable operation over time, giving peace of mind for a daily driver. If you swap out PC components frequently, an 850W unit may be more than you need.

Things to Consider

The CPS KN850 delivers 850W, which can be more than necessary for some configurations. A typical mid-range gaming PC with a mainstream CPU and GPU often runs fine on a 650W unit, so the 850W capacity is best viewed as headroom for future upgrades rather than a requirement for today's build.
When using the 12V-2x6 cable, make sure both ends are fully inserted and the plug is securely locked in place. Avoid bending the cable sharply near the connector. This is a general precaution that applies to any modern GPU power connection, but it is worth repeating here.
Compared with other 850W units that carry 80 PLUS Gold certification and ATX 3.1 support, the PCCOOLER is a lesser-known brand in the Japanese market. That said, the use of Japanese capacitors and the 5-year warranty indicate a focus on reliability. Before buying, confirm that your case supports ATX power supplies and that the included cables cover your build's requirements.

FAQ

Q: Which motherboards is this power supply compatible with?
A: As an ATX-form-factor unit, it works with any motherboard and case combination that supports ATX power supplies. The included 24-pin motherboard cable and two 8-pin CPU cables cover standard ATX motherboard connections without issue.
Q: Can I connect a current-generation graphics card directly?
A: Yes. The included 12V-2x6 cable enables direct PSU-to-GPU power delivery for compatible graphics cards. With PCIe 5.1 interface support, you can power modern GPUs natively.

Product Disclosure (Amazon)

  • Manufacturer: PCCOOLER
  • Model: P3-KN850-G1F
  • ASIN: B0HCSVJ4NB
  • Note: This article covers a manufacturer-made product based on Amazon listing details.