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SeaSonic FOCUS GX ATX 3 (2024) GX-1000 1000 W ATX 3.1 80 PLUS GOLD Certified Full Modular Power Supplies
- ATX 3.1
- Full Modular
- 80 PLUS GOLD Certified
- 100 - 240 V 50/60 Hz
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Overview
Specs
Reviews (4,611)
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 1 year
- Limited Warranty period (labor): 1 year
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
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The SeaSonic FOCUS GX ATX 3 (2024) GX-1000 is a 1000W, fully modular ATX 3.1 power supply with 80 PLUS Gold certification, designed for high-performance gaming PCs, workstations, and systems using modern power-hungry graphics cards.
Recommended For
- PC builders using a current high-end graphics card and processor who want a 1000 W ATX 3.1 supply with a native 12V-2x6 cable for modern GPU power delivery.
- Users assembling performance desktops for demanding gaming, content creation, 3D work, or other sustained workloads who value tested voltage stability, thermal performance, and efficiency over the lowest purchase price.
- Builders upgrading to a new platform who want extra power headroom for future GPU or CPU upgrades without replacing the power supply, provided their case supports a standard ATX unit.
- Cable-conscious builders who prefer a fully modular PSU and want to simplify cable routing in a gaming or workstation tower with multiple GPU, CPU, storage, or peripheral connections.
Real-World Use Scenarios
- A high-end gaming PC with a modern graphics card can use the PSU’s native 12V-2x6 cable, which reduces adapter clutter and supports the short power-demand spikes common during demanding games.
- When building in a mid-tower or other space-constrained ATX case, the 140 mm PSU depth leaves more room for cable routing, storage hardware, or a front radiator than many longer 1000 W units.
- For everyday desktop use, web browsing, and light gaming, the hybrid fan mode can keep the PSU fan stopped or running slowly, so the power supply is typically unobtrusive; sustained high loads make the fan audible.
- A workstation used for video rendering, 3D workloads, software builds, or other long-duration tasks gets stable power delivery and controlled temperatures, although the fan may become noticeable during extended heavy loads.
- A storage-heavy desktop or home workstation can connect several SATA drives and accessories without using every cable, because the fully modular design lets the builder install only the required leads.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Desktop systems requiring a 1000 W ATX 3.1 power supply with full modular cabling and 80 PLUS Gold efficiency |
| Power Capacity And Efficiency | 1000 W maximum power with 80 PLUS Gold certification |
| ATX Standard And Modularity | ATX 3.1 design with a fully modular power supply layout |
| Input Power | 100–240 V AC input at 50/60 Hz |
| Cooling | One 135 mm air-cooled fluid dynamic bearing fan |
| Connectors | Includes an ATX cable connection with a 20+4-pin ATX connector |
| Dimensions And Weight | 140 x 150 x 86 mm chassis, approximately 6.2 lb |
| Model Identifiers | SeaSonic FOCUS GX ATX 3 (2024) GX-1000 |
Reference Q&A
Q: Should I buy the Seasonic FOCUS GX-1000 ATX 3.1 or the Corsair RM1000e 2025?
A: Choose the Seasonic FOCUS GX-1000 when you want a 10-year warranty, a compact 140 mm PSU, native 12V-2x6 support, and a broad set of included modular cables. Choose the Corsair RM1000e 2025 when it is substantially cheaper or when its cable layout and zero-RPM fan mode better match your build; it also provides 1000 W, ATX 3.1, PCIe 5.1, and a 140 mm chassis, but its warranty is 7 years.
Q: Is the FOCUS GX-1000 worth choosing over the FOCUS GX-850?
A: Choose the FOCUS GX-850 if your estimated system load fits comfortably below 850 W and you do not expect a higher-power graphics card upgrade. Choose the FOCUS GX-1000 for additional power headroom, high-end CPUs and GPUs, or future upgrades. Both models use a 140 mm chassis, are fully modular, support ATX 3.1 and PCIe 5.1, and include a native 12V-2x6 cable, so the main difference is available capacity rather than size or connector compatibility.
Q: Should I get the Seasonic FOCUS GX-1000 or a higher-wattage VERTEX GX-1200?
A: Choose the FOCUS GX-1000 when 1000 W is sufficient and case space is important. Choose the VERTEX GX-1200 when you need sustained power headroom for a more demanding CPU-and-GPU combination or plan to upgrade to higher-power hardware. The FOCUS GX-1000 is shorter at 140 mm, while the VERTEX GX series uses a 160 mm chassis and offers a 1200 W option. Both series support ATX 3.1, PCIe 5.1, full modular cabling, and native 12V-2x6 connections.
Q: Is the 2024 FOCUS GX-1000 a meaningful upgrade over the older FOCUS GX-1000?
A: The 2024 model is a compatibility and design revision rather than a large capacity upgrade. It adds ATX 3.1 and PCIe 5.1 compliance, a native 12V-2x6 cable, and OptiSink thermal design while retaining 1000 W output, full modularity, 80 PLUS Gold efficiency, and a 140 mm chassis. It is the more convenient choice for a new build using a modern high-power GPU; replacing a functioning older FOCUS GX is less compelling if your existing unit already has the required cables and power capacity.
Q: Is the FOCUS GX-1000 a good choice for a compact case?
A: Yes, the FOCUS GX-1000 is suited to compact ATX builds that accept standard ATX power supplies because its PSU body is 140 mm long. It provides 1000 W, full modular cabling, a 135 mm FDB fan, and a native 12V-2x6 cable without using the longer 160 mm chassis found on Seasonic’s VERTEX GX series. Check the case’s stated PSU-length limit and allow additional room for cable bends, especially with a 12V-2x6 GPU cable.
Q: Is 1000W enough for a high-performance gaming or workstation PC?
A: Usually, yes. The SeaSonic FOCUS GX-1000 provides up to 1000W, making it suitable for many high-performance single-GPU systems and power-demanding workstations. Confirm that your system's estimated peak power draw and required CPU/GPU connectors are supported before buying.
Q: Will this power supply fit in my PC case?
A: It is 140 mm long, 150 mm wide, and 86 mm high, with a maximum PSU length of 150 mm. It should fit cases that support standard ATX power supplies with at least 150 mm of PSU clearance, but check the case specification and cable-routing space before installation.
Q: What are the benefits of this power supply being fully modular?
A: Fully modular cabling lets you connect only the cables your system needs. This can reduce unused cable clutter and make installation, cable routing, and future upgrades easier.
Q: Is ATX 3.1 useful for a new PC build or graphics card upgrade?
A: Yes. ATX 3.1 is the current power-supply standard listed for this model and is intended for newer PC platforms and graphics-card power behavior. However, the provided specifications do not list the included GPU power connectors, so verify the cable and connector requirements of your graphics card before purchase.
Q: Is 80 PLUS Gold efficient enough for everyday PC use?
A: Yes, 80 PLUS Gold is appropriate for general gaming, productivity, and workstation use. It indicates a certified efficiency level, while actual power efficiency varies with system load. The 135 mm fluid dynamic bearing fan is designed to cool the unit during operation.
Q: Is the Seasonic FOCUS GX-1000 ATX 3.1 a good choice for a high-end gaming PC?
A: It is a suitable option for high-end systems that need up to 1000 W, especially builds using newer GPUs with a native PCIe 5.1/12V-2x6 connection. It is fully modular, ATX 3.1 compliant, and 80 PLUS Gold certified. A lower-wattage PSU may be sufficient if the system's measured or estimated demand is well below 1000 W.
Q: Is the 2024 ATX 3.1 version worth choosing over an older ATX 3.0 or non-ATX 3.0 PSU?
A: Choose the 2024 ATX 3.1 model when you want native support for newer GPU power requirements and the included PCIe 5.1/12V-2x6 cable. An older high-quality PSU can still be adequate if it has enough capacity and the required cables or a suitable adapter, so the upgrade is not automatically necessary for every system.
Q: Is the Seasonic FOCUS GX-1000 quiet enough for a workstation or gaming PC?
A: The PSU has a 135 mm fluid-dynamic-bearing fan and hybrid fan operation, which can keep the fan stopped or slow under lower loads. User reports are mixed: some owners describe it as quiet, while others report fan noise or coil whine. Noise performance can vary by unit, load, and system, so buyers who require near-silent operation should consider the return policy.
Q: Will the Seasonic FOCUS GX-1000 fit in a compact PC case?
A: Its listed dimensions are 140 mm long, 150 mm wide, and 86 mm high, making it shorter than many 160 mm 1000 W alternatives. It can fit some compact cases, but buyers should verify the case's PSU clearance and allow room for modular cable connections and cable bending.
Q: Is 1000 W more power than most PCs need?
A: For many mainstream gaming systems, 1000 W provides substantial headroom and may be more capacity than necessary. It is more justifiable for high-power GPUs, heavily overclocked CPUs, workstation workloads, or planned upgrades. A lower-wattage model can be the better value when the system's expected peak load is comfortably below 1000 W.