Thermalright TR-TGFX 550 ATX v3.1 PSU Review

Transient Response

20% Load – 20ms

Advanced Transient Response 20% - 50 Hz - No Caps
Voltage Before After Change Pass/Fail
12V 12.076V 11.775V 2.49% Pass
5V 5.066V 4.973V 1.83% Pass
3.3V 3.359V 3.266V 2.76% Pass
5VSB 5.002V 4.945V 1.15% Pass

50% Load -20ms

Advanced Transient Response 50% - 50 Hz - No Caps
Voltage Before After Change Pass/Fail
12V 12.043V 11.759V 2.35% Pass
5V 5.062V 4.972V 1.78% Pass
3.3V 3.355V 3.260V 2.83% Pass
5VSB 4.970V 4.900V 1.42% Pass

The transient response is mediocre at 12V because the applied load stresses this low-capacity PSU. On the other hand, the minor rails behave well in these tests.

Transient Response ATX v3.1 Tests

This PSU doesn’t have a high-power PCIe connector, so the maximum transient loads are restricted to 150%. The PSU passes all ATX v3.1 transient response tests with flying colors! For those of you wondering why, in the 150% test, the 12V rail’s deviation is lower than at 145%. The difference between these load levels is low at just 5%. On the other hand, the 145% transient load lasts much longer (10x more), applying higher stress to the PSU.

I won’t provide any comparison ATX v3.1 transient response tests in this review because all other SFX PSUs I have evaluated so far were tested at different transient loads because they have high-power connectors (12V-2×6 or 12VHPWR).

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2 thoughts on “Thermalright TR-TGFX 550 ATX v3.1 PSU Review

  1. Can you do a review of the Thermalright TP-1000/1200? There’s a frustratingly low amount of information about it. Thanks in advance.

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