Antec Truepower Quattro 1200W Power Supply Review

Testing:

For more information on how we test our power supplies, please browse our testing methodology.

Electrical Safety:

Short Circuit Protection:

I short circuited the 3V3, 5V0 and the 12V rail in turn. The power supply did shut down, and once the short was removed and the unit switched off for at least one second, resumed normal operation. Although listed here at the beginning of the testing section, I tend to leave this test until the very end, in case it doesn't quite go to plan.

DC Output Voltage Load Regulation:

My load resistor network is geared up for four 12V rails and it proved very difficult to load all the six rails evenly during testing. Add to this a 12V1 rail that exclusively supplies, the peripheral connectors with only a single cable for the 12V rail just added to the problems. Twenty plus amps down a single wire isn't good, so more load resistors would be needed to distribute the 12V1 loading over two or three cables. It is for these reasons that I decided to treat this power supply as a single 12V rail PSU for testing purposes. Not as strange as it sounds, because at the end of the day this and the vast majority of multi 12V rail power supplies are just that, a single 12V rail power supply split into individual +12VX rails with current limiting built into each rail. The first phase of testing, up to 50% load, was done using 12V1 to 12V4 with extra resistors added to the 12V5 and 12V6 rails to help take the total 12V load up to nearly 90A and the total power supply load close to 100% of its maximum. Testing this way is perfectly valid in my opinion and makes little or no difference to the final results and conclusions.

Mains Input Voltage 110VAC

Mains Input Voltage 230VAC

The DC voltage load regulation of the Antec Truepower Quattro 1200W on all the rails is well within the limits set down by the ATX12V V2.2 specification at all times and for a power supply delivering over 1000W on the 12V rail alone, that's pretty good. No problems here, so let's move on.