Introduction and Features

The Corsair RM Series is optimized for silence and delivers Gold rated efficiency, comes with all-modular cables and is Corsair Link ready.

Corsair offers a full line of high quality power supplies, memory components, cases, cooling components, SSDs and accessories to the PC market.  Corsair's new RM Series includes six models; the RM450, RM550, RM650, RM750, RM850 and RM1000.  All of the power supplies in the RM Series feature all-modular cables, an energy-efficient design (80 Plus Gold certified) and quiet operation thanks to their ability to run without a cooling fun up to 40% load. The RM Series offers many of the same features as the Corsair HX Series (fanless operation, Gold level efficiency, fully-modular cables) but are a little less expensive. And all RM Series power supplies are Corsair Link ready, which means you can monitor the PSU fan speed and +12V output right from your desktop if you have a Corsair Link system set up on your PC. Previously the Corsair Link option was only available on Corsair’s premium AX Series Digital power supplies.

Here is what Corsair has to say about their RM550 PSU we will be looking at in this review: “The Corsair RM550 is fully modular and optimized for silence and high efficiency. It’s built with low-noise capacitors and transformers, and Zero RPM Fan Mode ensures that the fan doesn’t even spin until the power supply is under heavy load. And with a fan that’s custom-designed for low noise operation, it’s whisper-quiet even when it’s pushed hard.

80Plus Gold rated efficiency saves you money on your power bill, and the low-profile black cables are fully modular, so you can enjoy fast, neat builds. And, like all Corsair power supplies, the RM550 is built with high-quality components and is guaranteed to deliver clean, stable, continuous power. Want even more? Connect it to your Corsair Link system (available separately) and you can even monitor fan speed and +12V current directly from your desktop.

Corsair RM550 PSU Key Features:

• Silent, fan-less operation up to 40% load
• 80Plus Gold certified, delivering over 92% efficiency under real world loads
• Fully modular, low-profile flat cables help maximize case airflow
• Corsair Link ready!
• High-quality capacitors provide uncompromised performance and reliability
• Active PFC and Universal AC input (100-240 VAC)
• 5-Year warranty and lifetime access to tech support and customer service

PSU Testing Methodology

Establishing an accurate load is critical to testing and evaluating a PC power supply.  PCPerspective’s power supply test bench can place a precise DC load on the PSU under test.  Each power supply is tested under controlled, real-world conditions up to its maximum rated load (at 40ºC), using both 115 VAC and 240 VAC line voltage.  Our current suite of tests includes:

• DC Load Regulation
• AC Ripple and Noise
• Efficiency
• Differential Temperature
• Noise

The Corsair RM550 power supply was evaluated on both features and performance.  A full range of equipment was used to test the power supply under controlled load conditions. 

• (2) CSI3710A Programmable DC load (+3.3V and +5V outputs)
• (4) CSI3711A Programmable DC load (+12V1, +12V2, +12V3, and +12V4)
• (2) 200W Precision resistor load bank (+12V5 and +12V6)
• Switchable precision resistor load bank (-12V and +5VSB)
• Agilent 34401A digital multimeter (Accuracy ±0.0035% vDC)
• Extech 380803 Power Analyzer (Accuracy ±0.5% of full scale)
• DS1M12 "StingRay" digital oscilloscope (20M S/s with 12 Bit ADC)
• Powerstat Variable Autotransformer, 1.4 KVA, 0-140 VAC
• Extech Model 407738 digital sound level meter (Accuracy ±1.5 dB)

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