Seasonic Core BC 650/750/850 80+ Bronze

Seasonic CORE BC – ATX 3.1 Power Supply with 80+ Bronze (650W / 750W / 850W)

The Seasonic CORE BC series is a modern and affordable ATX power supply developed for stable and reliable operation in gaming and everyday builds. The series is fully ATX 3.1 compatible and meets the requirements for current and future graphics cards and platforms.

With 80 PLUS® Bronze certification, compact 140 mm depth, smart fan control (S2FC), and a 5-year warranty, the CORE BC offers a secure and efficient power supply in a compact format.

ATX 3.1 and PCIe 5.1 – Ready for Next-Gen GPUs

• Full ATX 3.1 compatibility

• PCIe 5.1 support

• 750W and 850W include native 12V-2x6 (PCIe Gen 5.1) cable

• 650W is ATX 3.1 compatible but uses traditional PCIe connectors

This makes the series compatible with modern RTX and high-end GPU solutions without an adapter.

Efficient and Stable Operation

• 80 PLUS Bronze certified

• Up to ±3% voltage regulation on 12V, 5V, and 3.3V

• Active PFC

• Full protection suite: OPP / OVP / UVP / SCP / OCP / OTP

According to the specification table in the datasheet (Power Distribution, page 1), the models deliver:

S2FC – Smart & Silent Fan Control

Seasonic uses S2FC (Smart & Silent Fan Control) which dynamically adjusts fan speed according to load and temperature.

• Quiet operation at low to medium loads

• Efficient cooling at high loads

• 120 mm HDB fan (Hydraulic Dynamic Bearing)

• Long lifespan and low noise level

Compact Design – Fits More Cases

• Depth: 140 mm

• Dimensions: 140 × 150 × 86 mm

• Scratch-resistant finish

• Fixed cabling (non-modular design)

The short length makes the unit suitable even for smaller ATX and mATX cases.

Connectors

All models include:

• 24-pin ATX

• 8-pin CPU (EPS 12V)

• SATA + Molex

Difference:

• 850W: 12V-2x6 + PCIe (6+2) + dual PCIe cable

• 750W: 12V-2x6 + PCIe

• 650W: Traditional PCIe (6+2) only

Choose the Right Wattage

650W – Perfect for mainstream gaming with RTX 4060/4070 class
750W – Balanced choice for powerful GPU and future-proofing
850W – For high-end GPUs and demanding systems

Summary

The Seasonic CORE BC series is a stable and modern ATX 3.1 power supply for those who want:

✔ PCIe 5.1 support
✔ 80+ Bronze efficiency
✔ Quiet operation with S2FC
✔ Compact 140 mm design
✔ 5-year warranty

A safe and rational choice for serious PC builds.