Silverstone ST1200-PTS PSU 1200W Power Supply Review: Page 6 of 7

Posted by Damon Bailey on Monday, August 26, 2019 - 8:00am

Testing & Performance

CPU: Intel Core i7-8700k

Motherboard: ASUS ROG Maximus X Apex

RAM: 32GB HyperX Predator RGB 3200Mhz

GPU: Nvidia RTX 2080 Founders Edition

SSD: Samsung 960 PRO 2TB

OS: Windows 10 Professional X64

We’ll start out saying we aren’t equipped to do extremely detailed electrical analysis required to pick apart a modern power supply. It takes dedicated laboratory-grade equipment to tell much difference between similar units, so we’ll have to make do with some less precise testing.

Silverstone ST1200-PTS PSU 1200W Power Supply 80+ Platinum

While we normally use a good Fluke Digital Multi-meter, we’ve found the onboard monitoring solutions in modern motherboards to be quite accurate and able to be easily logged with utilities like HWiNFO.

Silverstone ST1200-PTS PSU 1200W Power Supply 80+ Platinum

We see really nice voltage regulation on the 12V and 3.3V rails under load and idle both. Regulation on the 5V rail isn’t quite as tight but is still very good only deviating about 1.6%.

Next, we’ll look at ripple on the rails with our Owon VDS-1022/I Digital USB Oscilloscope.

Silverstone ST1200-PTS PSU 1200W Power Supply 80+ Platinum

 The +12V rail under a stress test load registers a peak of an 80mV peak to peak ripple, quite good. We are measuring from the end of one of the super long peripheral cables, so voltages are going to look a hair low here.

Silverstone ST1200-PTS PSU 1200W Power Supply 80+ Platinum

 The 5-volt rails fairs about the same at around 80mV of ripple.

Silverstone ST1200-PTS PSU 1200W Power Supply 80+ Platinum

The 3.3V rail does a fair job with 100mV of ripple. Modern systems typically put very little load on the 3.3V rail.

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