SeaSonic FOCUS GX ATX 3 (2024) GX-750 750 W ATX3.1 80 PLUS GOLD Nvidia RTX 40 Super/50 Certified Full Modular Power Supplies
- ATX3.1
- Nvidia RTX 40 Super/50
- Full Modular
- 80 PLUS GOLD Certified
- 100 - 240 V 50/60 Hz
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Overview
Specs
Reviews (4,610)
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 1 year
- Limited Warranty period (labor): 1 year
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Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
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Manufacturer Contact Info
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- Support Phone: 1-626-969-9966
- Support Website
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The SeaSonic FOCUS GX ATX 3 (2024) GX-750 is a 750 W, fully modular ATX 3.1 power supply with 80 PLUS Gold certification, suitable for gaming PCs using Nvidia RTX 40 Super or RTX 50 graphics cards.
Recommended For
- PC gamers building a single-GPU system with an RTX 40- or RTX 50-series graphics card, especially those who want a native 12+4-pin GPU cable and ATX 3.x power support instead of relying on adapter cables.
- Builders fitting a standard ATX power supply into a space-constrained mid-tower or compact ATX case, where the 140 mm PSU depth helps leave more room for cables and airflow.
- Users planning a long-term gaming or productivity build who want fully modular cabling, a selectable semi-passive fan mode, and a long manufacturer warranty rather than replacing the PSU during the next upgrade cycle.
- Desktop users who spend much of their time browsing, working, or gaming at light-to-moderate loads and prefer the PSU fan to remain off when temperatures and load allow it.
Real-World Use Scenarios
- A user building a modern gaming PC with a Radeon RX 9070 XT or a similar mid-to-high-end GPU can use the GX-750 as the main power source; the system should have enough capacity for a balanced CPU and GPU combination, while the native 12V-2x6 connection avoids relying on a separate GPU power adapter. ([amd.com](https://www.amd.com/en/products/graphics/desktops/radeon/9000-series/amd-radeon-rx-9070xt.html?utm_source=openai))
- Someone upgrading from an older power supply to an RTX 40- or RTX 50-series gaming build can simplify installation with the included native 12V-2x6 cable and ATX 3.1 support; this is most suitable for GPUs whose manufacturer recommends approximately 750 W, not flagship cards such as the RTX 4090 or RTX 5090. ([seasonic.com](https://seasonic.com/wp-content/uploads/2024/07/ATX3.1-FOCUS-GX.pdf))
- A builder working in a compact ATX or micro-ATX case can use the 140 mm-long PSU and fully modular cables to reduce installation difficulty and keep unused cables out of the case; the result is generally easier cable routing and more room around other components. ([hwbusters.com](https://hwbusters.com/psus/seasonic-focus-gx-750-v4-atx-v3-1-psu-review/))
- During extended gaming, rendering, or GPU-accelerated workloads, the GX-750 is likely to provide stable operation for a properly sized system; independent testing found ATX 3.1 power-excursion compliance, strong voltage regulation, high efficiency, and low average noise, although fan activity can increase as system load rises. ([hwbusters.com](https://hwbusters.com/psus/seasonic-focus-gx-750-v4-atx-v3-1-psu-review/))
- A content creator or home-server user with several SATA SSDs, hard drives, or accessories can use the modular cabling and multiple SATA connectors to build a storage-heavy system with less cable clutter; the 750 W capacity remains best suited to one-GPU systems rather than heavily expanded workstations. ([seasonic.com](https://seasonic.com/wp-content/uploads/2024/07/ATX3.1-FOCUS-GX.pdf))
- A noise-sensitive user building an otherwise silent PC may find the PSU unobtrusive at normal loads, but fan noise or coil whine can vary by system and individual unit; community reports show that some owners notice noise during idle or display-sleep states, so silent-PC buyers should keep the retailer’s return policy in mind. ([cybenetics.com](https://www.cybenetics.com/evaluations/psus/3203/))
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Desktop PC builds that need a 750 W ATX 3.1 power supply with full modular cabling, 80 PLUS Gold efficiency, and support for modern high-power components |
| Power Output And Efficiency | 750 W power output with 80 PLUS Gold certification for efficient desktop PC power delivery |
| Form Factor And Dimensions | ATX 3.1 design measuring 140 x 150 x 86 mm, with a maximum PSU length of 150 mm |
| Modularity And Connectors | Full modular design with ATX and PCI Express cable connectors, including a 24-pin ATX connector |
| Cooling | Air-cooled by one 135 mm fluid dynamic bearing fan |
| Input Power | Accepts 100–240 V AC input at 50/60 Hz for broad mains-voltage compatibility |
| Model Identifiers | SeaSonic FOCUS GX ATX 3 (2024) GX-750 |
Reference Q&A
Q: Is the Seasonic FOCUS GX-750 ATX 3.1 better than the Corsair RM750e for a modern gaming PC?
A: Choose the Seasonic FOCUS GX-750 when you want a compact 140 mm PSU, a 10-year warranty, ATX 3.1 compliance, and native 12V-2x6 GPU support. Choose the Corsair RM750e when its lower street price, compact 140 mm design, and flexible modular cable layout are more important. Both provide 750 W, 80 PLUS Gold efficiency, full modular cabling, and modern GPU support.
Q: Should I buy the Seasonic FOCUS GX-750 or the higher-tier Seasonic VERTEX GX-750?
A: Buy the FOCUS GX-750 for a shorter 140 mm chassis and easier installation in compact ATX cases. Buy the VERTEX GX-750 if you prefer Seasonic's higher-tier platform, a 12-year warranty, and tighter advertised voltage regulation. Both are fully modular, 80 PLUS Gold, ATX 3.1-compatible 750 W PSUs, but the VERTEX is longer at 160 mm.
Q: Is the Seasonic FOCUS GX-750 ATX 3.1 a worthwhile upgrade from the older FOCUS GX-750?
A: The 2024 FOCUS GX-750 is the better choice for a new build or a GPU upgrade because it adds ATX 3.1 and PCIe 5.1 support with a native 12V-2x6 cable. The older FOCUS GX-750 can remain suitable for systems using conventional PCIe power connectors, so replacing it is most useful when you need native modern-GPU connectivity or are already rebuilding the system.
Q: FOCUS GX-750 or be quiet! Pure Power 12 M 750W: which is better for a quiet PC?
A: Choose the be quiet! Pure Power 12 M when low-noise positioning and its 120 mm silence-optimized fan are the main priorities. Choose the Seasonic FOCUS GX-750 when you want a shorter 140 mm chassis and a larger 135 mm FDB fan in a compact build. Both offer 750 W, Gold efficiency, full modular cabling, modern PCIe GPU support, and a 10-year manufacturer warranty.
Q: Should I choose the Seasonic FOCUS GX-750 or step up to an 850W model?
A: Choose the FOCUS GX-750 when the system's estimated power draw leaves comfortable headroom and you are building around a mainstream or upper-midrange GPU. Choose an 850W model when you plan to use a higher-power graphics card, a power-hungry processor, heavy overclocking, or future upgrades. The 750W model is easier to fit because the 2024 FOCUS GX chassis remains 140 mm long, while wattage headroom is the main reason to move higher.
Q: Is 750W enough for a gaming PC with a modern NVIDIA RTX 40 Super or RTX 50 graphics card?
A: 750W can be suitable for many mainstream gaming systems using a compatible RTX 40 Super or RTX 50 graphics card, but suitability depends on the specific GPU, CPU, and other components. Check the graphics card manufacturer's recommended PSU wattage before buying. Higher-end GPUs or heavily overclocked systems may require more than 750W.
Q: Will this power supply fit in a standard ATX PC case?
A: Yes, it uses standard ATX power-supply dimensions and measures 140 mm long by 150 mm wide by 86 mm high. The 140 mm length is relatively compact for an ATX PSU, but you should still verify the case's maximum PSU length and clearance for cables, drive cages, and airflow.
Q: Is the SeaSonic GX-750 fully modular, and does that help with installation?
A: Yes. The GX-750 is fully modular, so only the required power cables need to be connected. This can simplify cable routing and improve space management, especially in cases with limited room behind the motherboard tray. Use only the modular cables supplied for this PSU; cables from another power supply may not be electrically compatible.
Q: Does ATX 3.1 make this PSU a good choice for a newer graphics card?
A: ATX 3.1 support makes the GX-750 suitable for systems designed around newer PCIe-generation graphics cards and modern power-delivery requirements. However, ATX 3.1 alone does not guarantee that every graphics card is supported at its recommended wattage or that a particular native GPU connector is included. Confirm the required connector and cable configuration before purchase.
Q: Is this PSU efficient and likely to be quiet during normal use?
A: The GX-750 is 80 PLUS Gold certified and uses a single 135 mm Fluid Dynamic Bearing fan. That combination supports efficient operation and a fan design intended for durability, but the listing does not establish a guaranteed noise level or fully fanless mode. Actual noise depends on system load, temperature, case airflow, and the fan-control profile.
Q: Is the Seasonic FOCUS GX-750 ATX 3 (2024) enough for an RTX 5070 Ti build?
A: Usually, yes, if the rest of the system has moderate power demands and the GPU manufacturer recommends 750 W. It is a reasonable match for a stock RTX 5070 Ti system, but users planning aggressive overclocking or higher-end future GPUs should consider more wattage for additional headroom.
Q: Is this 2024 ATX 3.1 version worth choosing over an older Seasonic FOCUS GX-750?
A: Choose the 2024 version when you want current ATX 3.1 support and a native modern Nvidia GPU power connection. The FOCUS GX name covers several revisions, so confirm that the listing specifically identifies the ATX 3 (2024) or ATX 3.1 model rather than an older non-ATX 3.x version.
Q: Can I reuse cables from an older Seasonic FOCUS GX-750 with this PSU?
A: Do not assume older modular cables are interchangeable. Use the cables supplied with the ATX 3 (2024) unit unless Seasonic explicitly confirms compatibility for the exact models and cable set; modular PSU connectors can have different wiring even when they look identical.
Q: Is the Seasonic FOCUS GX-750 ATX 3 (2024) a reliable PSU?
A: Available testing describes good regulation and overall performance, but one tested sample failed a 115 V over-current test while a second sample performed well. The practical takeaway is that it is a credible 750 W option, but buyers who prioritize maximum testing consistency should review the specific test results and warranty terms before purchasing.