PC Power Supply

What type of power supply is suitable for small computer cases (such as ITX)

2025-04-22

Core Requirements and Technological Innovations of ITX Power Supplies

With the popularity of Mini - ITX chassis (such as Lian Li TU150 and JONSBO V4), compact hardware design has placed strict requirements on power supplies. GAMEMAX has redefined industry standards through three major technological breakthroughs:


  1. Space Optimization: All power supplies in the series adopt the SFX/SFX - L specifications (standard size: 125×100×63.5mm). The short - body version of the GS450 (100mm in length) can be adapted to extremely compact chassis like the SilverStone SG13, saving 40% more space compared to traditional ATX power supplies.

  2. Energy - Efficiency Revolution: The flagship model, GX - 750, is equipped with an 80 Plus Gold certification. Its typical load efficiency reaches over 90%. Paired with all - Japanese 105℃ capacitors, it can stably support platforms such as i7 - 13700K + RTX 4080, with a standby power consumption of less than 0.5W.

  3. Intelligent Silence: The Titan series innovatively adopts a dual - mode temperature control system. When the load is low, the fan stops rotating (noise ≤ 18dB). When the load is high, the 135mm FDB fan increases the air volume to 55CFM through hydrodynamic design, improving the heat dissipation efficiency by 30% compared to traditional 9cm fans.

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II. In - Depth Analysis of the Entire GAMEMAX ITX Power Supply Series

1. Recommended Flagship Models


  • GX - 750 Gold Fully Modular Power Supply:

    • Core Parameters: 750W power, ATX3.1 standard, native 12VHPWR interface (600W continuous output), 10 - year warranty.

    • Technical Highlights: It uses an LLC resonant + DC - DC topology, with voltage fluctuations controlled within ±1%. It has passed a 1000 - hour aging test and can support the instantaneous power peak of RTX 4090 graphics cards.

    • Suitable Scenarios: High - end gaming PCs (such as i9 - 13900K + RTX 4090).

  • GS450 SFX Bronze Power Supply:

    • Core Parameters: 450W power, active PFC + double - tube forward architecture, short - body design (100mm in length), priced at around 200 yuan.

    • Technical Highlights: The intelligent temperature - controlled fan automatically stops rotating when the load is below 30%. It supports ITX/Matx chassis, and the wires use a 16AWG wire diameter to ensure stable power supply.

    • Suitable Scenarios: Office PCs (such as i5 - 12400 + integrated graphics) or entry - level gaming platforms.


2. Analysis of Technical Advantages


Technical IndicatorsGAMEMAX SolutionsIndustry Pain Points Comparison
Heat Dissipation Design135mm FDB fan + dual - mode temperature control system (GX - 750)Traditional 9cm fans generate noise ≥ 35dB under high load
Modular DesignFully modular wires support native PCIe5.0 interfaces (RGB1300)Non - modular wires cause clutter inside the chassis
CompatibilitySupports SFX - L to ATX adapter plates (e.g., for the CoolerMaster S3 chassis)Some brands require additional purchase of third - party accessories
Warranty Service10 - year warranty for the GX - Pro series, 5 - year warranty for models above 650W, and 3 - year warranty for models below 650WThe average industry warranty period is only 3 - 5 years


III. Installation Guide and Compatibility Solutions

1. Cable Management Tips


  • Custom Cable Solution: GAMEMAX provides flat modular cables (such as the cables included with the RGB1300). With a thickness of only 3mm, they can be routed along the edge of the motherboard in a hidden way. When paired with the Lian Li TU150 chassis, a full back - cable installation can be achieved.

  • Cable Routing Case: In the JONSBO V4 chassis, the GS450 power supply with its short - body design allows the CPU power cable to pass through the top, and the 24 - pin motherboard cable to be fixed along the side panel of the chassis, saving 50% of the internal space.


2. Compatibility Test Data


Chassis ModelPower Supply ModelGraphics Card Length LimitCPU Cooler Height LimitActual Power Consumption (Peak)Temperature Performance (Full Load)
Lian Li TU150GX - 750340mm68mm620W55°C
JONSBO V4GS450280mm70mm380W48°C
SilverStone SG13GX - 750330mm58mm590W58°C


Precautions:


  • It is recommended to use dual 8 - pin interfaces for graphics card power supply (e.g., 16AWG wire diameter is required for RTX 4090) to avoid voltage fluctuations under high load.

  • Some chassis (such as the CoolerMaster S3) need to be paired with GAMEMAX's dedicated adapter plates to ensure compatibility between SFX - L power supplies and ATX installation positions.


IV. Strategies for Noise Reduction and Heat Dissipation Optimization

1. Noise Control Solutions


  • Hardware - Level Optimization: The GX - 750 uses an FDB fan bearing. Combined with an intelligent temperature control algorithm, it automatically stops rotating when the load is below 40%, with a measured noise of ≤ 18dB.

  • Chassis Modification: Adding sound - insulating cotton to the Lian Li TU150 chassis can reduce the overall noise by 5 - 8dB without affecting the heat dissipation efficiency.


2. Key Points of Heat Dissipation Design


  • Air Duct Planning: Adopt the front - intake and rear - exhaust scheme. Install 2×12cm fans at the front and 1×12cm fan at the rear of the JONSBO V4 chassis to form a through - type heat dissipation channel.

  • Temperature Test: In an environment with a room temperature of 25°C, the full - load temperature of the GX - 750 stabilizes at 55°C, which is 7 - 10°C lower than similar products.


V. User Feedback and Long - Term Reliability

1. Test Data


  • Stability: The GX - 750 has passed a 1000 - hour aging test, with voltage fluctuations ≤ 1% and a ripple suppression rate of 99.5%.

  • User Reviews: Over 92% of users recognize its quiet performance. Typical feedback includes "Almost no sound can be heard during full - load operation" and "The cables are soft and easy to route."


2. Warranty and Service


  • Global Warranty: GAMEMAX offers a 10 - year warranty and supports free on - site repair in the Asia - Pacific region. The replacement cycle for accessories is ≤ 3 working days.

  • Technical Support: Technical consultations are responded to within 48 hours, and customized power supply solutions (such as dual - graphics card cross - fire configurations) are provided.


VI. Purchase Recommendations and SEO Optimization

1. Scenario - Based Recommendations


  • Limited Budget: The GS450 (450W) is suitable for office use or light gaming. Priced at around 200 yuan, it supports intelligent temperature control.

  • Mid - Range Gaming: The GX - 750 (750W) meets the requirements of RTX 4080, with a cost - performance ratio 35% higher than similar products.

  • High - End Flagship: The RGB1300 (1300W) supports dual - graphics card cross - fire and has native PCIe5.0 interfaces to adapt to the new generation of hardware.

 


GS-750G

ITX Power Supply GS-750G | Power Supply

• The GameMax SFX Series Power Supplies offer compact, high-performance solutions designed for small form factor builds, combining efficiency and reliability in one package。
•  Exceptional Performance: Certified 80 PLUS efficiency, precise voltage regulation, and smart fan control ensure dependable operation.
•  Compact and Powerful: The SFX Modular 750W (2024) measures 125mm x 110mm x 65mm, delivering robust power in a small footprint.
•  Optimized Cooling: GameMax hybrid fan control automatically adjusts cooling based on system demands for maximum efficiency.