Seasonic X-Series 850W KM3 Power Supply Review

1. Introduction2. Seasonic X-Series 850W KM3 (Bundle & Cables)3. Seasonic X-Series 850W KM3 (External)4. Seasonic X-Series 850W KM3 (Internal)5. Seasonic X-Series 850W KM3 (Super High Res Gallery)6. Testing Methodology7. Closing Thoughts8. View All Pages

The box artwork has been changed since the KM2, although the overall concept keeps the same colour scheme and understated ethic.

The supply is shipped protected between foam panels and is wrapped in a felt bag. We see very little possibility it could get damaged in transit.

Seasonic include a user manual, plastic and felt cable ties, alongside mounting screws. The cables are stored inside a two pouch bag, which can be reused. A regional specific power plug is also included.

Seasonic have changed the cabling to the popular ‘flat' ribbon style which can ease the routing phase and improve system airflow. They are still using high grade 18AWG cables, which is good to see.

The configuration of cables has changed. The older KM2 model had 4x PCI-E 8/6 Pin connectors, the new model ships with x6 of these headers. This is more than adequate, even for the most demanding SLI and Crossfire system builds.

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