Seasonic FOCUS GX V4 750W 80 Plus Gold ATX 3.1 PSU
Seasonic
Seasonic FOCUS GX V4 750W 80 Plus Gold ATX 3.1 PSU
The Seasonic FOCUS GX V4 750W 80 Plus Gold ATX 3.1 PSU is a fully modular power supply built for builders who need to run the latest PCIe 5.1 graphics cards and high-core-count processors without compromising on efficiency or noise. Compliant with the ATX 3.1 and PCIe 5.1 standards, it delivers 90% efficiency at 50% load and fits into compact cases thanks to its 140mm depth. A three-stage fan control system — including a fanless mode — keeps the build quiet during light workloads.
Why this product
ATX 3.1 and PCIe 5.1 ready
It ships with a native 12V-2×6 (12VHPWR) connector and meets the ATX 3.1 and PCIe 5.1 standards, making it compatible with the latest high-power graphics cards out of the box.
80 PLUS Gold: 90% efficiency at half load
The 80 PLUS Gold certification is achieved with 90% efficiency at 50% system load, reducing wasted energy and heat inside the case.
Three-stage Digital Hybrid Fan Control
Fanless Mode keeps it completely silent during light loads; Silent Mode and Cooling Mode activate progressively as temperatures rise, balancing acoustics against cooling.
Fluid Dynamic Bearing fan for low noise
The 135mm FDB fan uses oil to absorb vibration, generating less operating noise and heat than ball-bearing alternatives while also reducing friction and power consumption.
Compact 140mm depth fits small cases
At just 140mm deep, it fits in ATX cases with tighter PSU clearances — useful in mid-tower and HTPC enclosures where depth is a constraint.
10-year warranty and 105°C capacitors
Electrolytic capacitors are rated up to 105°C with 50,000-hour MTBF, and the unit is backed by a 10-year manufacturer warranty.
- Wattage750W
- Efficiency80 PLUS Gold (90% at 50% load)
- ATX StandardATX 3.1
- PCIe StandardPCIe 5.1
- ModularFully Modular
- Depth140mm
- Fan135mm Fluid Dynamic Bearing
- Warranty10 Years
- SKUSEA-726
- EAN4711173878445
- Compatible with ATX 3.1 motherboards and cases designed for standard ATX power supplies.
- Supports PCIe 5.1 graphics cards directly via the included native 12V-2×6 (12VHPWR) connector — no adapter required.
- Fully modular cabling works with any build that uses standard ATX connectors: 24/20-pin motherboard, CPU/PCIe, SATA, and Molex.
- The unit is 140mm deep; verify your case's minimum PSU depth clearance before purchasing — some ITX cases require shorter units.
- Not designed for SFX or SFX-L form factor cases, which require a smaller physical unit.
Best for
- High-end GPU builds: the native 12V-2×6 connector and PCIe 5.1 compliance make it a direct fit for current-generation graphics cards with large power headroom.
- Noise-sensitive environments: the three-stage fan control includes a fanless mode, so the unit runs silently during light or idle workloads.
- Compact mid-tower builds: the 140mm depth gives it flexibility in cases where longer PSUs would not fit or would obstruct cable routing.
- Long-term ownership: the 10-year warranty and 105°C-rated capacitors suit builders who want a platform they won't need to replace for years.
- Clean cable management: the fully modular design means unused cables never enter the case, which benefits airflow and aesthetics.
Trade-offs
- SFX or SFX-L case owners: this is an ATX unit at 140 × 150 × 86 mm — it will not fit the smaller PSU bays used in compact ITX enclosures.
- Very high-wattage system builders: the range tops out at 750W for this model; systems requiring more continuous power need a higher-rated unit.
- Budget-first buyers: the 10-year warranty, FDB fan, and ATX 3.1 compliance place it above entry-level pricing — builders who do not need PCIe 5.1 or the advanced fan control may find a lower-tier unit sufficient.
Following the well-established legacy of the Seasonic FOCUS Series, the FOCUS GX Series has been upgraded to comply with the ATX 3.1 and PCIe 5.1 standards. It offers a complete range of power supplies from 750W to 1000W, all within a compact 140mm depth. Each unit features a 135mm fan, a 12V-2×6 cable, and our new OptiSink technology. These units are designed to be perfect allies in powering the latest high-power graphics cards and processors available on the market.
The FOCUS GX ATX 3.1 Series achieves 80 PLUS® Gold certification with its 90 % efficiency at 50 % system load.
The industry's first, Seasonic patented, advanced three-phased thermal control achieves optimal between silence and cooling. This Digital Hybrid Fan Control functions in three operational stages: Fanless Mode, Silent Mode, and Cooling Mode.
Optimal heat dissipation ensured at all times, further enhanced with OptiSink technology.
High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are extremely reliable and generate considerably less operating noise and heat than ball bearing fans. The lubrication of the bearing surface reduces friction and vibration and therefore lowers overall power consumption.
General
| Brand | Seasonic |
|---|---|
| Model | FOCUS GX ATX 3.1 750W (FOCUS-GX-750-V4) |
| Wattage | 750W |
| Colour | Black |
| Warranty | 10 Years |
Efficiency & Standards
| Efficiency Rating | 80 PLUS Gold |
|---|---|
| Efficiency at 50% Load | 90% |
| ATX Standard | ATX 3.1 |
| PCIe Standard | PCIe 5.1 |
| Modular | Fully Modular |
Cooling & Build
| Fan Size | 135mm |
|---|---|
| Fan Bearing Type | Fluid Dynamic Bearing (FDB) |
| Fan Control | Digital Hybrid Fan Control (Fanless / Silent / Cooling Mode) |
| Capacitor Rating | Up to 105°C / 50,000 hours MTBF |
| Dimensions (D × W × H) | 140 × 150 × 86 mm |
Connectors
| Motherboard Connector | 1 × 24/20-pin |
|---|---|
| CPU / PCIe Connectors | 5 × CPU/PCIe |
| PCIe 5.1 (12V-2×6) Connector | 1 × PCIe 5.1 (12VHPWR) |
| SATA / Molex Connectors | 4 × SATA/Molex |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.