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Asus ROG Thor 1200W PSU Review – a heavily modified Seasonic!

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the RTSS01-1200P1’s rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 13.3 mV 4.4 mV 12.4 mV 7.3 mV Pass
20% Load 14.9 mV 4.6 mV 14.3 mV 8.4 mV Pass
30% Load 8.7 mV 4.7 mV 14.8 mV 9.1 mV Pass
40% Load 8.7 mV 4.9 mV 15.7 mV 8.7 mV Pass
50% Load 10.2 mV 6.1 mV 16.6 mV 10.6 mV Pass
60% Load 11.0 mV 6.3 mV 17.5 mV 11.6 mV Pass
70% Load 12.3 mV 6.5 mV 18.4 mV 13.6 mV Pass
80% Load 13.7 mV 7.8 mV 22.1 mV 15.2 mV Pass
90% Load 16.3 mV 8.3 mV 21.9 mV 16.9 mV Pass
100% Load 20.9 mV 8.9 mV 23.2 mV 18.6 mV Pass
110% Load 21.5 mV 9.5 mV 22.5 mV 20.9 mV Pass
Crossload 1 13.7 mV 7.7 mV 22.1 mV 7.7 mV Pass
Crossload 2 21.5 mV 6.5 mV 13.8 mV 17.2 mV Pass


The ripple suppression is very good overall. Only the 3.3V rail is a bit high compared to the rest rails. With the use of extra in-cable caps ripple would be lower, however the cables would be bulkier. On top of that, it isn’t so easy to add filtering caps on individually sleeved cables, so we believe that for a few mV lower ripple it doesn’t worth the trouble, in this platform at least.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.

Ripple At Full Load

Ripple At 110-Percent Load

Ripple At Cross-Load 1

Ripple At Cross-Load 2

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