Corsair SF1000L SFX-L PSU Review

Protection Features

OCP (Cold @ 26°C)

12V: 101.4A (121.73%), 12.05V
5V: 28.9A (144.5%), 5.052V
3.3V: 30.5A (152.5%), 3.298V
5VSB: 5A (166.67%), 4.977V

OCP (Hot @ 42°C)

12V: 99.2A (119.09%), 12.052V
5V: 28.9A (144.5%), 5.059V
3.3V: 30.6A (153%), 3.302V
5VSB: 4.8A (160%), 4.997V

OPP (Cold @ 27°C)

1221.46W (122.15%)

OPP (Hot @ 41°C)

1195.44W (119.54%)


✓ (120°C @ 12V Heat Sink)


12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓


Proper operation



Surge: MOV
Inrush: NTC Thermistor & Bypass relay

The OCP triggering points are correctly set at 12V, but this is not true for the minor rails where OCP is sky high, especially at 3.3V, without any reason. On the other hand, OPP is correctly set. All other protection features are present and work well.

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6 thoughts on “Corsair SF1000L SFX-L PSU Review

  1. Another excellent review, Aris – thank you! It’s safe to say that I wouldn’t even consider buying a PSU without your thorough review. I do wonder though, I noticed that the unit is actually Platinum rated according to:

    Perhaps this was a marketing choice by Corsair, but even so, an odd one!

    I’m currently torn between the Corsair SF1000L (noise isn’t a concern as long as the fan does its job), the Thermaltake Toughpower 1000W, and the ROG-Loki. However, I’m hesitant about the ROG-Loki due to reported coil whine issues. If you could only recommend one SFX-L 1000W+ PSU, which would you choose (even if not listed)?

    Thanks in advance for your insights!

    1. It is Platinum in Cybenetics, because of the different methodology that it uses compared to 80 P.
      I don’t have an Asus Loki review sample so far and this troubles me. Asus marketing in general is so so, rarely sending out review samples.
      I would go for the Corsair SFX-L. Currently it is the best option, especially if you don’t care about noise at high loads.

  2. Can your reviews add coil whine testing… Certain loads with coil whine Dba test results or something. I found all the Corsair PSUs appear to have some coil whine under load. Asus Loki apparently has as much if not more coil whine. Apparently Seasonic PSUs have less coil whine but a lot of complaints about fan noise (I replace fans in my PSUs) :P. I do like the Corsair PSUs, I build for silence so coil whine under load conditions defeats this goal.

    1. Actually most complain for coil whine in the seasonic Vertex. We do test for coil whine but the fact is that we only get 2 samples per unit. If we notice coil whine we mention that in the reviews.

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