Thermaltake GF1 Fully Modular ATX Alternatives: 6 Similar Picks Compared
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Finding the right thermaltake gf1 fully modular atx alternatives starts with understanding what the base unit offers. The Thermaltake GF1 750W delivers 80 Plus Gold efficiency, fully modular cables, and a DC-to-DC design with a single +12V rail. Its 140mm fluid bearing fan uses Smart Zero Fan technology to minimize noise during low loads, supported by built-in industrial grade protections. This makes it a dependable foundation for standard ATX mid-range setups.
You might look elsewhere if your system demands specific features or layout adjustments. For instance, you may want updated ATX 3.1 and PCIe 5.1 standards with dedicated 12V-2x6 power connections, higher 80 Plus Platinum efficiency, or an expanded 850W capacity. Other builds require side-oriented cable sockets to simplify routing or different physical dimensions for specific chassis spaces. The 6 alternatives in this guide were chosen because their specifications directly overlap with the original, giving you comparable fully modular ATX power with targeted upgrades.
Our top pick: Thermaltake GF1 750W Gold Power Supply.
Comparing Thermaltake GF1 Alternative Power Supplies
Corsair RM750x Shift White 750W ATX Power Supply
The Corsair RM750x Shift White matches the Thermaltake GF1 at 750 watts and 80 Plus Gold efficiency, but updates the architecture to ATX 3.1 and PCIe 5.1 standards. Its distinguishing physical feature is a side-mounted modular connector interface, which routes cables out the side of the chassis rather than the back. At 6.3 inches long and 3.75 pounds, it is longer and heavier than the 5.9-inch, 3.37-pound GF1. You also get a clean white finish instead of standard dark housing. You give up the GF1's conventional rear connector layout. Choose this unit if you have a chassis with sufficient side clearance and want native ATX 3.1 power delivery.
Redragon 750W Platinum SFX Power Supply
The Redragon 750W unit targets higher electrical efficiency than the Thermaltake GF1, stepping up from 80 Plus Gold to Platinum certification. It also brings ATX 3.0 platform readiness for newer graphics hardware configurations. However, its dimensions differ significantly at 7.87 inches wide, 4.72 inches high, and 11.8 inches long, weighing 3.88 pounds compared to the GF1 at 5.5 by 3.4 by 5.9 inches and 3.37 pounds. You also do not receive an included 12VHPWR cable, requiring you to source one separately for compatible cards. Pick this supply if your setup prioritizes Platinum-grade efficiency and you have adequate enclosure space to house its larger physical footprint.
Corsair RM750x Shift White 750W Power Supply
This Corsair RM750x Shift shares the same 750-watt capacity and 80 Plus Gold rating as the Thermaltake GF1, but introduces ATX 3.1 and PCIe 5.1 compatibility. It features side-facing modular terminal ports in an all-white enclosure, allowing direct side cable routing. At 6.3 inches in length and 3.75 pounds, it takes up more chassis depth than the 5.9-inch, 3.37-pound GF1. You give up standard rear-plug modular flexibility, meaning it will not fit properly in cases lacking side cable channel depth. You should choose this model over the GF1 if you are building an updated ATX 3.1 system in a compatible case that accommodates side cables.
Corsair RM750x 750W ATX 3.1 Power Supply
The Corsair RM750x delivers 750 watts like the Thermaltake GF1, but transitions from older standards to full ATX 3.1 and PCIe 5.1 specifications. It adds a dedicated 12V-2x6 connector for modern graphics cards, alongside Cybenetics Gold efficiency. The GF1 relies on 80 Plus Gold certification and a 140mm fluid dynamic bearing fan with Smart Zero Fan functionality. At 3.88 pounds, this Corsair unit weighs slightly more than the 3.37-pound GF1. You give up the GF1's larger 140mm fan assembly. You should select this alternative if you need native 12V-2x6 cable connectivity and up-to-date ATX 3.1 compliance for modern mid-tier graphics hardware.
Corsair RM750e 750W ATX 3.1 Power Supply
The Corsair RM750e provides the same 750-watt output as the Thermaltake GF1 while incorporating ATX 3.1 and PCIe 5.1 revisions. It includes a native 12V-2x6 connection and carries Cybenetics Gold efficiency. Physically, it measures 5.51 by 3.35 by 5.91 inches and weighs 3.3 pounds, making it comparable in size and marginally lighter than the 3.37-pound GF1. What you give up is the GF1's 140mm fluid bearing fan and Smart Zero Fan mode, as well as its traditional 80 Plus Gold rating. You should pick the RM750e if you want modern standard compliance and direct 12V-2x6 power routing within standard ATX casing dimensions.
Corsair RM850x 850W Fully Modular ATX 3.1 PSU
The Corsair RM850x steps up capacity from the Thermaltake GF1's 750 watts to 850 watts, offering 100 extra watts for higher-tier hardware. It also adopts ATX 3.1 and PCIe 5.1 standards, providing a native 12V-2x6 connector that the GF1 lacks. The RM850x carries Cybenetics Gold efficiency and weighs 3.9 pounds, compared to the 3.37-pound GF1. You give up the GF1's specific 140mm fluid bearing cooling fan with zero-RPM control and its 80 Plus Gold rating. Pick this model over the GF1 if your build demands more continuous headroom for higher-wattage components and requires updated ATX 3.1 connector cabling.
Quick picks
Our 7 picks
Thermaltake GF1 750W Gold Power Supply
Best for: standard ATX mid-range gaming builds
- Wattage
- 750W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- Fan Size
- 140mm
- Form Factor
- ATX
- Dimensions
- 5.9 × 5.5 × 3.4 inches
The Thermaltake GF1 is a fully modular ATX power supply delivering 750 watts of output with 80 Plus Gold efficiency. It features a 140mm fluid bearing fan paired with a Smart Zero Fan mode to stop spinning during low loads. Built with a single +12V rail and DC-to-DC design, this unit fits standard ATX cases measuring 5.9 inches long. It suits your build if you need clean Gold-rated power and flexible modular cabling.
Pros
- 80 Plus Gold certified efficiency
- 140mm fluid bearing fan with Smart Zero Fan mode
- Fully modular cable configuration
- High-amperage single +12V rail with DC-to-DC design
Cons
- 750W maximum output limits headroom for higher-draw hardware
- Standard ATX dimensions do not fit compact SFX enclosures
Good fit if
- You want a fully modular 750W power supply with 80 Plus Gold efficiency.
- You prefer a 140mm fan that shuts off under low system loads.
- You have a standard ATX PC case with room for a 5.9-inch long unit.
Skip if
- You need more than 750 watts of power for high-draw components.
- You are assembling a small-form-factor build that requires an SFX power supply.
Verdict: Thermaltake GF1 750W Gold Fully Modular PSU delivers 750 watts of 80 Plus Gold power with quiet zero-RPM cooling. It provides dependable single-rail DC-to-DC performance for standard ATX mid-range gaming builds.
Corsair RM750x Shift White 750W ATX Power Supply
Best for: ATX 3.1 builds with side-cable clearance
- Wattage
- 750W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- Fan Size
- 140mm
- PCIe Version
- PCIe 5.1
View on Amazon: Corsair RM750x Shift White 750W ATX Power Supply
The Corsair RM750x Shift is a 750W fully modular power supply built around the ATX 3.1 and PCIe 5.1 standards. It delivers 80 Plus Gold efficiency and features side-mounted Type 5 micro-fit cable connections for direct access inside your case. With its 140mm fluid dynamic bearing fan and 105°C-rated Japanese capacitors, it suits you if you want modern standard compliance and simplified side-panel cable routing in a mid-power build.
Pros
- Side-mounted modular panel with Type 5 micro-fit connections
- ATX 3.1 certified and supports PCIe 5.1
- 80 Plus Gold efficiency rating
- 140mm fluid dynamic bearing fan with Zero RPM support
Cons
- Side-facing cable ports require adequate side clearance in your case
- 6.3-inch housing length is longer than compact ATX frames
Good fit if
- You want side-mounted modular ports for easier cable access.
- You need an ATX 3.1 and PCIe 5.1 compliant 750W power supply.
Skip if
- You have a case with limited clearance next to the power supply bay.
- You require more than 750W of output for your system.
Verdict: Corsair RM750x Shift 750W Gold ATX Power Supply delivers ATX 3.1 compliance and 80 Plus Gold efficiency with a unique side-mounted connection design. It gives you reliable 750W power delivery provided your chassis has enough clearance for side cables.
Redragon 750W Platinum SFX Power Supply
Best for: Compact builds needing Platinum efficiency
- Wattage
- 750 Watts
- Efficiency Rating
- 80 Plus Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- Size
- 750W
- Dimensions
- 11.8 × 7.87 × 4.72 inches
This Redragon power supply provides 750 watts of output with an 80 Plus Platinum efficiency rating. It features a compact SFX design with an included bracket for standard chassis setups, fully modular flat white cabling, and ATX 3.0 compliance. A 60°C zero-RPM thermal fan profile ensures silent operation during lighter loads. You will find it matches compact or standard builds requiring high electrical efficiency and tight voltage regulation.
Pros
- 80 Plus Platinum efficiency rating
- Compact SFX form factor with ATX panel compatibility
- Zero-RPM fan mode below 60 degrees Celsius
- Built with 100% Japanese capacitors
Cons
- 12VHPWR cable not included in the package
- Compact SFX chassis requires bracket usage in standard ATX bays
Good fit if
- You need 80 Plus Platinum electrical efficiency in a 750-watt unit.
- You build in small-form-factor or tight chassis enclosures.
- You want a zero-noise fan profile during low thermal loads.
Skip if
- You need an included 12VHPWR cable out of the box.
- You prefer a native standard-depth ATX power supply housing.
Verdict: Redragon 750W Platinum SFX Power Supply delivers high-tier electrical efficiency and ATX 3.0 platform readiness in a compact footprint. You must provide a separate 12VHPWR cable to run compatible high-end graphics cards.
Corsair RM750x Shift White 750W Power Supply
Best for: cable routing in cases with side clearance
- Wattage
- 750W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- Fan Size
- 140mm
- PCIe Version
- PCIe 5.1
View on Amazon: Corsair RM750x Shift White 750W Power Supply
The Corsair RM750x Shift 750W White ATX PSU provides 750 watts of 80 Plus Gold efficiency with Intel ATX 3.1 and PCIe 5.1 compliance. It places modular connections on the side of the unit rather than the rear, using compact micro-fit cables. Equipped with a 140mm fluid dynamic bearing fan and 105°C-rated Japanese capacitors, it suits builders who want accessible cable management in compatible ATX cases.
Pros
- Side-mounted modular panel for easier cable access
- Intel ATX 3.1 certified and PCIe 5.1 compliant
- 140mm fluid dynamic bearing fan with Zero RPM mode
- 100% 105°C-rated Japanese electrolytic capacitors
Cons
- Side interface requires dedicated case clearance beside the PSU
- Uses Type 5 micro-fit connectors rather than standard-sized modular cables
Good fit if
- You have an ATX case with open space beside the power supply bay.
- You need ATX 3.1 and PCIe 5.1 compliance for recent hardware.
- You want a white power supply with fully modular connections.
Skip if
- You use a compact chassis that blocks access to the PSU side panel.
- You need more than 750 watts of output for higher-draw components.
Verdict: Corsair RM750x Shift 750W White ATX PSU delivers reliable Gold-rated power with an unusual side-facing layout. It streamlines cable routing provided your chassis leaves adequate clearance along the side.
Corsair RM750x 750W ATX 3.1 Power Supply
Best for: modern mid-tier builds needing ATX 3.1
- Wattage
- 750W
- Efficiency Rating
- Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- PCIe Version
- PCIe 5.1
The Corsair RM750x is a fully modular ATX power supply delivering 750W of power. It meets modern ATX 3.1 standards and Cybenetics Gold efficiency, reaching up to 91 percent efficiency. It includes a native 12V-2x6 connector for direct PCIe 5.1 graphics card support without adapters. This unit suits you if you need a clean, cable-managed build with modern GPU power delivery, flexible embossed cabling, and standard ATX chassis compatibility.
Pros
- Cybenetics Gold certified for up to 91% efficiency
- Native 12V-2x6 connector provides direct PCIe 5.1 GPU power
- ATX 3.1 compliant to resist transient power spikes
- Fully modular embossed cables include low-profile combs
Cons
- 750W ceiling limits headroom for high-draw hardware
- Only offered in a black finish
Good fit if
- You need native 12V-2x6 power delivery for a PCIe 5.1 graphics card without extra adapters.
- You want ATX 3.1 compliance paired with Cybenetics Gold efficiency.
- You prefer fully modular embossed cables with low-profile combs for neat routing.
Skip if
- You need more than 750W of capacity for ultra-high-end hardware.
- You require a compact SFX form factor supply for a small chassis.
Verdict: Corsair RM750x ATX 3.1 750W Power Supply offers updated ATX 3.1 compliance and native 12V-2x6 connectivity with Cybenetics Gold efficiency. It delivers reliable, fully modular power routing for modern graphics setups.
Corsair RM750e 750W ATX 3.1 Power Supply
Best for: modern ATX 3.1 builds needing 750W
- Wattage
- 750 Watts
- Efficiency Rating
- Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 120mm
The Corsair RM750e is a 750W fully modular ATX power supply built to ATX 3.1 and PCIe 5.1 standards. You get an included 12V-2x6 power connector for modern graphics cards, Cybenetics Gold efficiency, and 105°C-rated capacitors. It includes a 120mm rifle bearing fan and supports Modern Standby sleep modes. This unit suits you if you want native next-generation hardware compatibility in a standard 750-watt system.
Pros
- ATX 3.1 and PCIe 5.1 compliant with native 12V-2x6 cable
- Cybenetics Gold efficiency certification
- Fully modular cable system
- Internal capacitors rated for 105°C
Cons
- Uses a 120mm fan rather than a larger 135mm or 140mm fan
- Maximum power capacity is limited to 750 watts
Good fit if
- You need native ATX 3.1 compliance and a 12V-2x6 connector.
- You want fully modular cabling to keep your case tidy.
- You use Modern Standby sleep states for fast wake times.
Skip if
- You need more than 750 watts for high-draw hardware.
- You prefer a power supply featuring a larger 135mm or 140mm fan.
Verdict: Corsair RM750e 750W ATX 3.1 Power Supply delivers modern PCIe 5.1 power delivery and Cybenetics Gold efficiency in a fully modular footprint. It provides updated power standard compliance for systems requiring up to 750 watts.
Corsair RM850x 850W Fully Modular ATX 3.1 PSU
Best for: 850W builds needing ATX 3.1 standards
- Wattage
- 850W
- Efficiency Rating
- Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- PCIe Version
- PCIe 5.1
View on Amazon: Corsair RM850x 850W Fully Modular ATX 3.1 PSU
The Corsair RM850x is a fully modular ATX power supply delivering 850W of continuous power. Built to the ATX 3.1 and PCIe 5.1 standards, it includes a dedicated 12V-2x6 connector for modern graphics cards alongside a Cybenetics Gold efficiency rating. If you need higher wattage than standard 750W alternatives and demand updated power delivery specs for current hardware, this unit suits your build requirements directly.
Pros
- 850W continuous power output
- ATX 3.1 compliant and PCIe 5.1 ready
- Dedicated 12V-2x6 power connector
- Fully modular cable system
- Cybenetics Gold efficiency rating
Cons
- Cybenetics rated without published 80 PLUS certification
- Available only in black finish
Good fit if
- You need an 850W power supply for hardware demanding more headroom than 750W.
- You require native ATX 3.1 compliance and a PCIe 5.1 12V-2x6 connector.
- You prefer fully modular cabling to connect only necessary power runs.
Skip if
- You only require a 750W power supply for your components.
- You need a power supply with an official 80 PLUS certification.
- You are planning a white-themed PC build.
Verdict: Corsair RM850x 850W Fully Modular PSU delivers modern ATX 3.1 compliance and dedicated 12V-2x6 connectivity with Cybenetics Gold efficiency. It gives your system dependable 850W output with complete modular cable flexibility.
Specifications side by side
| Spec | Thermaltake GF1 750W Gold Power Supply | Corsair RM750x Shift White 750W ATX Power Supply | Redragon 750W Platinum SFX Power Supply | Corsair RM750x Shift White 750W Power Supply | Corsair RM750x 750W ATX 3.1 Power Supply | Corsair RM750e 750W ATX 3.1 Power Supply | Corsair RM850x 850W Fully Modular ATX 3.1 PSU |
|---|---|---|---|---|---|---|---|
| Wattage | 750W | 750W | 750 Watts | 750W | 750W | 750 Watts | 850W |
| Efficiency Rating | 80 Plus Gold | 80 Plus Gold | 80 Plus Platinum | 80 Plus Gold | Cybenetics Gold | Cybenetics Gold | Cybenetics Gold |
| Modularity | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular |
| ATX Version | not specified | ATX 3.1 | ATX 3.0 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | not specified | not specified | not specified | not specified | 12V-2x6 | 12V-2x6 | 12V-2x6 |
| Fan Size | 140mm | 140mm | not specified | 140mm | not specified | 120mm | not specified |
| Form Factor | ATX | ATX | ATX | ATX | ATX | ATX | ATX |
| PCIe Version | not specified | PCIe 5.1 | not specified | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 |
| Connector | not specified | not specified | not specified | not specified | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector |
| Size | 750W | 750W | 750W | 750W | 750W | 750W | 850W |
| Dimensions | 5.9 × 5.5 × 3.4 inches | 6.3 × 5.91 × 3.39 inches | 11.8 × 7.87 × 4.72 inches | 6.3 × 5.91 × 3.39 inches | 2.3 × 3.39 × 5.91 inches | 5.91 × 5.51 × 3.35 inches | 2.3 × 3.39 × 5.91 inches |
| Weight | 3.37 pounds | 3.75 pounds | 3.88 pounds | 3.75 pounds | 3.88 pounds | 3.3 pounds | 3.9 pounds |
| Color | Information Not Available | White | not specified | White | Black | Black | Black |
| Model | TPD-750AH2FLG | CP-9020273-NA | PSU015 | CP-9020273-NA | CP-9020285-NA | CP-9020295-NA | not specified |
Frequently asked questions
What makes an ATX 3.1 power supply a viable alternative to the Thermaltake GF1?
An ATX 3.1 power supply gives you updated platform readiness for modern components compared to older designs. Models like the Corsair RM750x and Corsair RM750e feature dedicated PCIe 5.1 compliance and native 12V-2x6 connectors. This hardware standard ensures your system supports current high-draw graphics cards cleanly, whereas traditional modular units rely on older multi-cable PCIe configurations.
Can you run high-end graphics cards on the Redragon 750W Platinum power supply?
You can power high-end hardware with the Redragon 750W unit, but you must supply a separate 12VHPWR cable. The unit delivers 750 watts across a fully modular layout and supports the ATX 3.0 platform with Platinum efficiency. Because it does not bundle the 12VHPWR cable in the package, you need to verify your graphics card connections before installation.
How do the physical dimensions of the Corsair RM750e compare to the Thermaltake GF1?
The Corsair RM750e shares nearly identical case dimensions with the Thermaltake GF1 750W. The RM750e measures 5.51 inches wide, 3.35 inches high, and 5.91 inches long, matching the 5.5-inch width, 3.4-inch height, and 5.9-inch length of the GF1. This compact footprint allows you to swap units easily inside compact ATX cases without clearance issues.
When should you choose the Corsair RM850x over a 750-watt alternative?
You should pick the Corsair RM850x when your components demand higher continuous wattage than standard 750W supplies offer. It provides 850 watts of output alongside ATX 3.1 and PCIe 5.1 specifications. It also includes Cybenetics Gold efficiency and a dedicated 12V-2x6 connector, ensuring you have extra capacity and proper cabling for power-hungry hardware configurations.
What case clearance do you need for the Corsair RM750x Shift?
You must confirm your computer case has dedicated open space along the side panel of the power supply chamber. The Corsair RM750x Shift measures 6.3 inches long, 5.91 inches wide, and 3.39 inches high, but its modular ports face the side rather than the back. Standard chassis layouts without sufficient lateral room will block your cable connections.
How do efficiency ratings compare among these Thermaltake GF1 alternatives?
The Thermaltake GF1 operates at 80 Plus Gold efficiency, while alternatives deliver either Gold or Platinum performance. The Corsair RM750x and RM750e carry Cybenetics Gold ratings, ensuring equivalent power conservation. For builders aiming for reduced thermal waste, the Redragon 750W power supply steps up to Platinum efficiency, converting power with lower heat loss under heavy operational loads.