Seasonic S12III 750 Bronze
Expert rating7.2 / 10
- Wattage:
- 750 W
- 80 PLUS Rating:
- Bronze
- Modularity:
- Non-Modular
- ATX Standard:
- ATX 2.x
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Manufacturer: Seasonic Last updated: 2026-09-12
Where to buy
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Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick) Review
Looking for a 750W budget PSU from a manufacturer that actually builds its own units in-house, the Seasonic S12III 750 Bronze skips modular cables and the Gold rating of Seasonic's Focus line to hit a lower price point.
We like this one specifically because Seasonic doesn't outsource S12III to a third-party OEM the way most budget brands do, so build quality is a step above typical Bronze units at this price. The tradeoff is fixed cables, which makes routing messier in smaller cases.
Build Quality vs Budget Peers
Seasonic designs and builds the S12III platform itself rather than rebadging a generic OEM unit, which is unusual at this price tier and shows up as more consistent voltage regulation under load compared to typical budget Bronze competitors.
Comparison to Alternatives
Against the Seasonic Focus GX-750, the S12III-750 drops to Bronze efficiency and non-modular cables to hit a noticeably lower price, while the Focus GX-750 adds Gold efficiency and full modularity for gamers who want cleaner cable routing. Against the MSI MAG A750BN, both are non-modular 750W Bronze units, but the S12III benefits from Seasonic's in-house build reputation.
Specifications
Identity
| Brand | Seasonic |
|---|---|
| Model Number | S12III-750 |
Output and rails
| Single +12V Rail | Yes |
|---|
Form factor and fit
| Length | 140 mm |
|---|---|
| Colour | Black |
Build quality
| Topology | Group-regulated with DC-DC on minor rails |
|---|---|
| MTBF | 100000 hours |
Cables
| Modularity | Non-Modular |
|---|
Monitoring, protection and price
| Protections | OCP, OVP, SCP, OTP |
|---|---|
| Price | 69.99 USD |
| Warranty | 5 years |
| Wattage | 750 W |
|---|---|
| 80 PLUS Rating | Bronze |
| ATX Standard | ATX 2.x |
| Form Factor | ATX |
| 12V-2x6 Connectors | 0 |
| Zero-RPM Mode | No |
| Sleeved Cables | No |
| PCIe 8-pin Connectors | 2 |
| Connector Count | 1x 24-pin ATX, 1x EPS 4+4, 2x PCIe 6+2-pin, 6x SATA, 2x Molex (all fixed) |
| Fan Size | 120 mm |
| Fan Model / Bearing | 120mm sleeve bearing |
| OEM / Platform | Seasonic in-house |
| Cable Lengths | 24-pin 500mm, EPS 500mm, PCIe 450mm, SATA 500-650mm |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating7.2 / 10
A better-built-than-average budget Bronze unit for buyers who trust the Seasonic name over a modular cable set.
Best for
- Budget builds that still want Seasonic build quality
- Mid-range GPUs like the RTX 4060 Ti or RX 7700 XT
- Buyers who don't mind fixed cables
Not for
- Small cases needing tight cable management
- Anyone wanting Gold-rated efficiency
- High-end multi-GPU builds
FAQs
What are the key specifications of the Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick)?
The Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick) is a power supply from Seasonic. Key specs: Wattage 750 W, 80 PLUS Rating Bronze, Modularity Non-Modular, ATX Standard ATX 2.x, 12V-2x6 Connectors 0.
Will the Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick) work with my current setup?
The Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick) lists Wattage is 750 W. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick) best suited to?
It suits budget builds that still want seasonic build quality, mid-range gpus like the rtx 4060 ti or rx 7700 xt, buyers who don't mind fixed cables.
What are the drawbacks of the Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick)?
It is a poor fit for small cases needing tight cable management, anyone wanting gold-rated efficiency, high-end multi-gpu builds.
Compare and read more
- ASUS TUF Gaming 750W Bronze (750W/80+ Bronze/Semi-Modular/ATX 2.x/Mainstream Gaming Tier) vs Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick)
- be quiet! Pure Power 12 550W (550W/80+ Gold/Semi-Modular/ATX 2.x/Mainstream Value Pick) vs Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick)
- Antec HCG850 Gold Extreme (850W/80+ Gold/Fully Modular/ATX 3.0/High-End Tier) vs Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick)
- ASUS ROG Strix 1000W Gold ATX3.0 (1000W/80+ Gold/ATX/Fully Modular/ATX 3.0) vs Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick)
- be quiet! Pure Power 12 M 750W (750W/80+ Gold/ATX 3.0/Mainstream Gaming Tier) vs Seasonic S12III 750 Bronze (750W/80+ Bronze/Non-Modular/ATX 2.x/Budget Value Pick)