XPG KYBER 850W ATX v3.1 PSU Review

Transient Response

20% Load – 20ms

Voltage Before After Change Pass/Fail
12V 12.003V 11.666V 2.80% Pass
5V 5.002V 4.881V 2.41% Pass
3.3V 3.283V 3.138V 4.43% Pass
5VSB 5.050V 5.001V 0.97% Pass

50% Load -20ms

Voltage Before After Change Pass/Fail
12V 11.980V 11.816V 1.36% Pass
5V 4.992V 4.865V 2.55% Pass
3.3V 3.275V 3.123V 4.64% Fail
5VSB 4.999V 4.948V 1.02% Pass

The 3.3V rail performs badly here; the same goes for the 12V rail in the first test.

Transient Response ATX v3.x Tests

The PSU passes all ATX v3.1 transient response tests, but the 3.3V rail is right on the limit in the 200% load test.

The 12V rail drops low, especially in the 200% load test. Given the fixed cables, which help since they minimize resistance, compared to modular cables, I expected better results.

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One thought on “XPG KYBER 850W ATX v3.1 PSU Review

  1. I am unsure if many users will opt to pay 110 dollars for a native-cables-only PSU in 2024, given that with 10-15 dollars more, they can get a fully modular ATX v3.x compliant (e.g., the Thermaltake GF3 A3 850).

    On page 11, I think there’s a typo in the thermaltake model’s name (GF A3 vs GF3 A3)

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