Antec Signature Platinum 1300W Power Supply Review

Antec Signature Platinum 1300W
(Image: © Tom's Hardware)

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Protection Features

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Protection Features



12V: 146A (135.19%), 12.24V 5V: 30.2A (120.8%), 5.107V 3.3V: 31.5A (126%), 3.351V 5VSB: 3.8A (126.67%), 5.026V


1802.69W (138.67%)


✓ (151°C @ 12V Heat Sink)


12V: ✓ 5V: ✓ 3.3V: ✓ 5VSB: ✓ -12V: ✓


Proper Operation



Surge: MOV Inrush: NTC Thermistor & Bypass Relay

This is a highly capable and powerful platform. Still, we would like to see within 130% OCP at +12V and OPP. There are no-load regulation or ripple issues at such high loads, but at high operating temperatures, things might change under the same load conditions. Moreover, there is no need, in such a high capacity PSU, to provide such a large overpower window. 

DC Power Sequencing

According to Intel’s most recent Power Supply Design Guide (revision 1.4), the +12V and 5V outputs must be equal to or greater than the 3.3V rail at all times. Unfortunately, Intel doesn't mention why it is so important to always keep the 3.3V rail's voltage lower than the levels of the other two outputs.

The 3.3V rail is lower than the other two in all cases, so there are no issues here. 

Cross Load Tests

To generate the following charts, we set our loaders to auto mode through custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The deviations in each of the charts below are calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature during testing was between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

Load Regulation Charts

Efficiency Chart

(Image credit: Tom's Hardware)

Ripple Charts

The lower the power supply's ripple, the more stable the system will be and less stress will also be applied to its components.

Infrared Images

We apply a half-load for 10 minutes with the PSU's top cover and cooling fan removed before taking photos with a modified FLIR E4 camera able to deliver an IR resolution of 320x240 (76,800 pixels).

We didn't notice increased temperatures, despite the 650W load with the fan disconnected. The hottest part during these tests was the main transformer. 

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Contributing Editor

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.