Flex ATX Power Supplies GAMEMAX

Driven by the trend of PC hardware miniaturization, Flex ATX power supplies (Flexible ATX PSUs) have emerged as core components for mini-PCs, HTPCs, and small-form-factor cases, combining compact size with high efficiency. These power supplies break through the limitations of traditional ATX specifications, integrating high-power conversion capabilities into dimensions as small as 100mm×63.5mm×125mm (SFX) or even smaller (e.g., TFX), while balancing quiet operation and stability. Below, we delve into the technical advantages and application scenarios of Flex ATX power supplies, incorporating products from GameMax's lineup.

I. Technical Definition and Market Value of Flex ATX Power Supplies

Flex ATX is not a single specification but a general term covering small-form-factor standards like SFX (Small Form Factor) and TFX (Thin Form Factor). Compared to standard ATX power supplies, they are 30%-50% smaller in volume, yet through circuit optimization and new material applications, their power range has expanded from the early 200W to over 850W. GameMax's GS and GT series exemplify these products:

• GS-850G BK: An 80 Plus Gold-certified SFX power supply featuring Japanese capacitors and an intelligent temperature-controlled FDB fan. Within 125mm×100mm×63.5mm, it delivers 850W with over 90% efficiency, supporting ATX3.1 and PCIe5.1 standards for compatibility with RTX 40-series graphics cards.

• GT-450P BK: A TFX-form-factor 80 Plus Platinum power supply, measuring only 175mm×85mm×65mm with 92% efficiency. Equipped with an 80mm silent fan, it suits ultra-thin cases as thin as 7cm.

The core value of these power supplies lies in resolving the contradiction between "small size and high performance": The LLC resonant topology + DC-DC circuit design (e.g., the APFC+LLC scheme used in GameMax's GX PRO series) reduces energy loss, while a single +12V high-current output (e.g., the 12V-2×6 interface on GS-750G) directly supports high-end CPU and GPU power demands, avoiding current loss in traditional multi-rail designs.

II. Core Technical Highlights of GameMax Flex ATX Power Supplies

1. Efficiency Certification and Energy-Saving Design
   GameMax's Flex ATX power supplies cover the full range of 80 Plus certifications from Bronze to Platinum:

• GS-650G BK (80 Plus Gold): Achieves over 90% efficiency under typical loads. With a DC-DC dual-control circuit, it minimizes ripple noise in 3.3V/5V outputs, ensuring stability for motherboards and storage devices.

• RGB PRO 1300P (though ATX3.1, its technology applies to Flex ATX): 80 Plus Platinum-certified with over 92% efficiency. The adaptive fan stops under low loads for "zero noise" operation.

2. The Art of Balancing Silence and Cooling

• FDB Fans and Intelligent Temperature Control: The GS series uses Fluid Dynamic Bearing (FDB) fans that adjust speed automatically with load, producing noise as low as 18dBA (e.g., GT-450G). Some models (e.g., RGB PRO series) feature 140mm ARGB fans supporting motherboard lighting synchronization for both cooling and visual effects.

• Optimized Heat Dissipation Structure: The honeycomb ventilation design of GS-750G, combined with fully modular cables, reduces airflow obstruction in the case, maintaining temperatures below 40℃ even in compact spaces.

3. Modular and Compatible Design

• Fully/Semi-Modular Interfaces: GS-850G supports on-demand cable connection, reducing redundant cables that hinder heat dissipation, ideal for cable management in ITX cases. TFX power supplies (e.g., GT-350P) use flat cables for easier installation despite non-modular designs.

• Support for New Interfaces: High-end models like GX-1250 PRO BK feature native 12V-2×6 interfaces for PCIe5.1 graphics cards, while the GS series ensures compatibility with new interfaces via adapters, avoiding upgrade issues.

III. Application Scenarios and Selection Guidelines for Flex ATX Power Supplies

1. Typical Application Scenarios

• Mini-PCs and HTPCs: Systems like Intel NUC or AMD Ryzen Mini paired with GS-450G BK (450W) can power an i5 processor + GTX 1650 graphics card while meeting 4K video output power demands.

• Small Servers and Workstations: GM-1650 BK (1650W, though ATX, its multi-GPU support concept is referable) supports 8 independent +12V outputs, while the Flex ATX-spec GS-850G suits small rendering workstations with 2-3 RTX 3060s, saving rack space.

• MOD Custom Cases: The ARGB fan and fully modular design of RGB PRO 750G cater to compact cases with personalized lighting needs, such as Jonsbo D30 side-transparent models.

2. Key Selection Parameters

• Power Matching: Base on "CPU + GPU power × 1.3". For example, RTX 4070 (200W) + i7-13700K (125W) requires at least GS-650G (650W).

• Certification Level: 80 Plus Gold and above suit long-term high-load scenarios (e.g., servers), while Bronze is suitable for daily office use (e.g., GM-600B).

• Size Compatibility: SFX power supplies require SFX or SFX-compatible cases (e.g., NZXT H210i), while TFX suits ultra-thin models (e.g., Silverstone ML08).

IV. Future Trends: Technological Breakthroughs in Flex ATX Power Supplies

With the popularization of PCIe5.1 and ATX3.1 standards, Flex ATX power supplies are evolving toward "higher power and lower noise". GameMax's GX PRO series has achieved 1250W in ATX3.1，and its SFX product line may soon introduce gallium nitride (GaN) components to further reduce size and increase efficiency to over 94%. For users, choosing Flex ATX power supplies that support future interfaces and offer long warranties (e.g., GameMax's 10-year warranty on some models) will be the optimal solution to balance current needs and upgrade potential.

From the silent operation requirements of HTPCs to the high-performance demands of mini-workstations, Flex ATX power supplies are no longer "compromised choices" but inevitable products of technological iteration. Brands like GameMax are redefining the performance boundaries of compact power supplies by downsizing high-end ATX power supply technologies (e.g., LLC resonance, full-bridge topology) into smaller form factors—this is not just a reduction in hardware specifications but a comprehensive upgrade in efficiency and experience.