The Seasonic FOCUS GX-1000 ATX 3 (2024) is a 1000W, fully modular ATX 3.1 power supply with a hybrid fan mode. As part of the upgraded FOCUS GX series, it now complies with ATX 3.1 and PCIe 5.1 standards.
As of this publication date, Seasonic released this power supply in mid-November 2024 at an MSRP of $189.99 USD for the Black colorway, while the White colorway is priced at an MSRP of $199.99 USD. This version features Seasonic's new 'OptiSink' internal design. The naming scheme may be slightly confusing, as this power supply has been released with "ATX 3 (2024)" appended to the previous model name.
The FOCUS GX-1000 ATX 3 (2024) is recommended for its wide range of accessories, high efficiency at low loads, and solid overall performance.
WHAT YOU NEED TO KNOW
THE GOOD
- Colorways
This power supply is available in both white and black, making it one of the few white Seasonic power supplies on the market.
- Load Regulation
The power supply performed well in terms of load regulations across all rails except the 5Vsb. However, the 5Vsb still remained within specifications, and critical components will not be reliant on it.
THE BAD
- Nothing at the time of writing
THE REST
- Overall
The FOCUS GX-1000 ATX 3 (2024) performed as expected for its class and price range. It is recommended for its high efficiency at low loads, and solid overall performance.
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The Seasonic FOCUS GX-1000 ATX 3 (2024) is an ATX form factor power supply that comes with a range of accessories, including a PSU and cable bag, a PSU tester, and velcro cable ties. The cables are flexible with an etched braided pattern. This power supply is available in both white and black.
The newly released version is designed with Seasonic's 'OptiSink' internal design, which reorganized internal components to improve heat dissipation and airflow. A 135 mm fluid dynamic bearing fan ensures efficient cooling.
The power ratings and specifications align with expectations for this price range. On the Seasonic specifications webpage it specifies that the Operating Temperature is 0°C to 50°C, though we cannot verify this through testing.
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Front of the box.
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Power input side of the PSU.
Top of the PSU displaying the fan.
Bottom of the PSU displaying the specifications.
| +12 V | +5 V | +3.3 V | +5 Vsb | -12 V | |
|---|---|---|---|---|---|
| CURRENT | 83 A | 25 A | 25 A | 3 A | 0.3 A |
| WATTAGE | 996 W | 125 W | 15 W | 3.6 W | |
| 1000 W | |||||
Please note that the above ratings are manufacturer advertised specifications.
The FOCUS GX-1000 ATX 3 (2024) includes a single hybrid fan mode, controlled by Seasonic's "Digital Hybrid Fan Control". It operated in three stages: Fanless Mode, Silent Mode, and Cooling Mode. The power supply also includes standard protections and is backed by a 10-year warranty, typical for power supplies in this class.
- Default: Fan always operating
- Hybrid: Zero fan speed under approximately 30% load.
In terms of performance, the FOCUS GX-1000 ATX 3 (2024) showed good results, with good load regulation across all rails except for the 5Vsb rail, which approached the minimum specification under high loads. However, this should not pose any issues as critical components do not rely on the 5Vsb rail. The 12V rail maintained a stable voltage with a drop of only 0.152V across its full rated power range of 1000W, meeting ATX specifications.
The power supply met ATX ripple specifications, with an average peak-to-peak signal ripple of 38 mV on the 12V rail, and 31 mV and 36 mV on the 5V and 3.3V rails, respectively. This power supply had slightly high noise at low loads, but this did not increase throughout. It handled most excursion tests, failing only some of the fastest durations. This is unlikely to cause issues with most workloads.
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The FOCUS GX-1000 ATX 3 (2024) is 80PLUS Gold certified, delivering 91% efficiency at 50% of its maximum rated load. This is about average, slightly higher than power supplies that can handle up to 50% of their rated load in this class.
In brownout tests, it sustained dropouts for up to 12 ms at 115V and 11 ms at 230V, which is shorter than average. This shorter duration may make the power supply less resilient to brownouts.
The power supply's protections triggered consistently through the tests. The Over Power Protection engaged at 138% of the rated load, and the 12V rail alone handled up to 115A or 139% of its rating, ensuring safety in case of minor overdraw.