Seasonic Focus SPX Series 750 W SFX PSU Review 27

Seasonic Focus SPX Series 750 W SFX PSU Review

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Introduction

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We would like to thank Seasonic for supplying the review sample.


Seasonic recently released an SFX PSU with 750 W maximum power output in an attempt to dethrone the mighty Corsair SF750 Platinum, which is the best currently available SFX PSU offering. A significant advantage the SPX-750 has over the SF750 is the long 10-year warranty, as the Corsair offers 7 years for its flagship SFX offering. In my opinion, anything above five years is unreasonable when it comes to power supplies, which are highly dependent on the quality of the mains grid, and external factors can affect the latter (e.g., thunderbolts). If a power surge or brownout damages your PSU, the warranty won't cover it, which is reasonable because PSU manufacturers are not responsible for the power grid's quality.

The SPX-750 uses a fully modular cable design with enough EPS and PCIe connectors to support a potent gaming system. It is 80 PLUS and Cybenetics Platinum certified for efficiency and Cybenetics Standard+ certified for noise output. The cooling fan measures 92 mm across and uses a fluid dynamic bearing. It also has a semi-passive operation. With a street price of $190 to $200, it isn't affordable, so it will have to deliver top performance and reliability to justify its high price tag. As this is written, the Corsair SF750 is slightly more affordable as this is written.

This is the first desktop PSU with fan failure protection I have come across. In other words, if the fan has a problem or the PSU doesn't detect it, which would happen if it isn't connected, the SPX-750 won't start.

Specifications

Seasonic Focus SPX-750
Features & Specifications
Max. DC Output750 W
PFCActive PFC
Efficiency80 PLUS Platinum, Cybenetics Platinum
NoiseCybenetics Standard+ (35–40 dBA)
ModularYes (fully)
Intel C6/C7 Power State SupportYes
Operating Temperature0–50 °C (derating from 100 % to 80 %, from 40 °C to 50 °C)
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Over Current Protection
Short Circuit Protection
Cooling92mm fluid dynamic bearing fan (HA9215SH12FD-F00)
Semi-Passive OperationYes
Dimensions (W x H x D)125 x 65 x 100 mm
Weight1 kg (2.2 lb)
ComplianceSFX12V
Warranty10 years
Price at Time of Review (excl. VAT)$190–200
Seasonic Focus SPX-750
Power Specifications
Rail3.3 V5 V12 V5 VSB-12 V
Max. Power20 A20 A62 A3 A0.3 A
130 W744 W15 W3.6 W
Total Max. Power750 W
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Jun 25th, 2022 06:12 EDT change timezone

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