EVGA SuperNOVA 650 GM SFX 650W Power Supply: Page 6 of 7

Posted by Damon Bailey on Wednesday, November 27, 2019 - 8:00am

Testing & Performance

  • CPU: Intel Core i9-9900k
  • Motherboard: ASUS ROG Strix Z390-E
  • RAM: 16GB G.Skill TridentZ Neo 3200 MHz.
  • 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 laboratory-grade dedicated equipment so we’ll have to make do with some less precise testing.

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.

EVGA’s 650 GM provides very very good regulation on the 12V main rail with the 5V staying hot on its heels. The 3.3V rail hangs a little more loosely and runs just a hair low, EVGA says within 2%, but we are right on the edge here even though we are still WELL within ATX specifications..

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

 The +12V rail under a stress test load registers a peak of 160mV peak to peak ripple.

 The 5-volt rail comes in around 160mV of ripple.

The 3.3V rail does a great job with 80mV of ripple.

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