Corsair SF750 SFX Fully Modular 80 PLUS Platinum review

The SF750 is a 750 W SFX power supply from Corsair, measuring 100x125x63.5 mm. It is fully modular and carries both 80 PLUS Platinum and Cybenetics Efficiency Platinum ratings. It is aimed at compact builds that still want a current-generation graphics cable and a fair amount of headroom.

The +12V rail is rated at 62.5 A, or 750 W, so the full continuous rating is available on 12V. Corsair lists the unit as ATX 3.1 compliant with PCIe 5.1 support, and says it is formally certified for ATX 3.1. Corsair also says short spikes up to 850 W are handled. That is a marketing claim about spikes, not the continuous rating, so plan your build around 750 W.

Tom's Hardware's earlier SF750 review found load regulation within tolerance and 12V ripple of 17.6 mV at 70% load, below ATX limits. KitGuru recorded a +12V ripple peak of 20 mV under full load on the earlier SF750. Owners also praise the ripple and regulation. Those reviews covered an earlier SF750, so treat them as a guide to the current unit rather than a guarantee.

Tom's Hardware's earlier review lists the OEM as Great Wall, though that may not apply to the current unit. One review page lists protections as OVP, OCP, OPP and SCP. That is a listing, not lab testing.

Hold-up time is the one area a reviewer called weak. If you run a system where brief mains dips matter, that is worth knowing.

The unit carries Platinum ratings from both 80 PLUS and Cybenetics, and the reported figures are consistent with that. Tweak Reviews gives 92% efficiency at 150 W, 95% at 400 W and 90% at 750 W. The 92% result at 150 W is relevant if your PC spends much of its time well below full load. At the full 750 W, the reported figure is 90%.

The fan is a 92 mm PWM design with a fluid dynamic bearing and a Zero RPM mode. Cybenetics rates it Noise A-. Hardware Busters found noise stayed below 40 dBA in all cases it tested, and passed 30 dBA at around 500 W on the 12V rail. Owners praise the quiet operation.

There is one recurring complaint. Some owners say the fan becomes audible under heavy load, with speed rising quickly. With a 92 mm fan in an SFX body, that fits a unit that is quiet at light and moderate loads but less so when pushed hard. A build that sits near 750 W for long periods may not stay as quiet as one that mostly idles.

The unit is fully modular and uses Type-5 Micro-Fit connectors. The supplied cables are one 12VHPWR (12+4-pin) at 400 mm, two PCIe 8-pin (6+2) at 400 mm, eight SATA, three PATA and two EPS. The native 12VHPWR cable means a card that uses that connector needs no adapter from the supplied set.

With one 12VHPWR and two PCIe 8-pin cables, it suits a single-GPU build. A card or setup that needs more than two 8-pin connectors is not covered by the supplied PCIe cables. Eight SATA connectors leave room for several drives, and two EPS cables cover boards that want them.

Corsair gives a 7-year warranty. That cover matters for a unit that will sit inside a tight case where swapping it out is a chore.

The SF750 suits small builds where efficiency, low ripple and low noise matter more than a long list of connectors. Its strengths are the Platinum rating, the native 12VHPWR cable, ATX 3.1 support and the quiet running owners describe. Its limits are the fan becoming audible under heavy load, the weaker hold-up time and the two PCIe 8-pin cables.