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Performance, Noise and Efficiency
As expected, considering the test results that we gathered, the Seasonic SFX-L unit achieves a high overall performance score. The Corsair SF600 is a bit higher, but the difference is not that large.
The graph below depicts the cooling fan's average noise over the PSU's operating range, with an ambient temperature between 30°C and 32°C (86°F to 89.6°F).
Mostly because of the aggressive fan profile at high loads, the SSR-650SGX fails to achieve a below 35 dB(A) overall noise output.
The following graph shows the PSU's average efficiency throughout its operating range with an ambient temperature close to 30°C.
This is an efficient platform, easily meeting the basic requirements (>88% overall efficiency) of the ETA-A certification.
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Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.