Corsair RM Series (2019) 80+ Gold Fully-Modular Power Supplies Review: Page 6 of 7

Posted by Damon Bailey on Friday, May 31, 2019 - 8:00am

Testing & Performance

CPU: Intel Core i9-9900k

Motherboard: ASUS ROG Maximus XI Formula

RAM: 32GB HyperX Predator RGB 3200Mhz

GPU: Nvidia RTX 2080 Founders Edition

SSD: OCZ RD400 512GB

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.

Corsair RM650

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

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.

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

The 12V regulation is VERY tight, at well under 1% under heavy load.

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

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

 The +12V rail under a stress test load registers a tiny 80mV peak to peak ripple.

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

 The 5-volt rails fairs even better at around 40mV of ripple.

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

The 3.3V rail does a decent job with 120mV of ripple. Modern systems typically put very little load on the 3.3V rail, often only a couple of amps on modern systems for NVMe drives powered from the PCIe bus directly.

Corsair RM750

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

The 3.3V rail is a little tighter on this model, but the 12V rail runs just a hair looser.

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

 The +12V rail under a stress test load registers the same 80mV peak to peak ripple we saw on the RM650.

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

 The 5-volt rails fairs well with about 80mV of ripple.

Corsair RM Series (2019) RM650 RM 750 PSU Power Supply Supplies

The 3.3V rail does a decent job with 120mV of ripple.

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