Corsair SF1000L SFX-L PSU Review

The Corsair SF1000L follows the SFX-L form factor, offering top performance, high efficiency and ATX v3.0 and PCIe 5.o compatibility. 

Corsair released its first SFX-L units, the SF1000L and SF850L. After the top-notch SF series, the SF-L line arrived, bringing higher capacity and ATX v3.0 and PCIe 5.0 compatibility. In the SF1000L unit, the Cybenetics Platinum efficiency shows the unit’s high efficiency. At the same time, the Cybenetics Standard noise rating doesn’t seem so good when it comes to noise output, but I will analyze this later in the review. Besides the usual connectors, there is also a 12VHPWR set at 600W, so the SF1000L won’t have a problem powering an NVIDIA RTX4090 with a high-end CPU.

With a price of $200, the SF1000L is way more affordable than competing offerings from Asus, Thermaltake, and Silverstone since it is $60 to $100 cheaper! At the time of the review, the ASUS ROG Loki SFX-L 1000W was sold for $270, the Thermaltake Toughpower SFX 1000 at $300, and the SilverStone SX1000 Platinum at $315. I obtained all price information from Newegg.

The Corsair SF1000L is included in my best ATX v3.0 & PCIe 5.0 PSU picks article.




Technical Specifications:
  • Manufacturer (OEM): Great Wall
  • Max Power: 1000W
  • Cybenetics Efficiency: [115V] Cybenetics Platinum (89-91%)
  • 80 Plus Efficiency: Gold
  • Noise: Cybenetics Standard (40-45 dB[A])
  • Compliance: ATX v3.0, SFX-L, EPS 2.92
  • Operating Temperature (Continuous Full Load): 0 – 50°C
  • Alternative Low Power Mode support: Yes
  • Power 12V combined: 1000W
  • Number of 12V rails: 1
  • Power 5V + 3.3v: 150W
  • Power 5VSB: 15W
  • Cooling: 120mm Fluid Dynamic Bearing Fan (NR1215)
  • Semi-Passive Operation: ✓
  • Modular Design: Yes (Fully)
  • High Power Connectors: 2x EPS (2x cables), 5x PCIe 6+2 pin (4x cables), 1x PCIe 12+4 pin (600W)
  • Peripheral Connectors: 8x SATA (2x cables), 3x 4-pin Molex (single cable)
  • ATX Cable Length: 300mm
  • EPS Cable Length: 400mm
  • 12VHPWR Cable Length: 400mm
  • Distance between SATA: 110/115mm
  • Distance between4-pin Molex: 110/110mm
  • In-cable capacitors: No
  • Dimensions (W x H x D): 125 x 65 x 130mm
  • Weight: 1.16 kg (2.56 lb)
  • Warranty: seven years
  • Stree price (excluding VAT): $200

Power Specifications

Rail 3.3V 5V 12V 5VSB
Max. Power Amps 20 20 83.3 3
Watts 150 1000 15
Total Max. Power (W) 1000
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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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