As mini PCs, HTPCs, and compact gaming cases gain popularity, Mini ATX power supplies (including SFX and TFX form factors) have emerged as the new favorite for builders, balancing "reduced size with uncompromised performance." As an innovator in power supply technology, GameMax's Mini ATX product line—covering the GS, GT, and other series—integrates 80 Plus certification, modular design, and a compact architecture, offering diverse solutions for users who prioritize both spatial aesthetics and stable power delivery. As evident from product documentation, GameMax Mini ATX power supplies stand out with three key advantages: they are 1/3 to 1/2 the size of standard ATX supplies, compatible with ITX/Mini ATX cases; they support up to 80 Plus Platinum efficiency, exceeding industry standards; and the entire series features premium Japanese capacitors, intelligent thermal control, and other 硬核 (hardcore) configurations, shattering the misconception that "small power supplies mean compromised quality."
Represented by models like GS-850G BK and GS-750G BK, these power supplies feature 80 Plus Gold certification, achieving over 90% efficiency under typical loads. Equipped with an LLC + DC-DC resonant circuit, they control 12V output ripple within 50mV, ensuring stable operation for high-end CPUs and graphics cards. Key highlights include:
Compact Form Factor and Modular Design: Measuring 125mm×100mm×63.5mm in standard SFX size—40% smaller than traditional ATX supplies—their fully modular cables allow for customizable connections, optimizing cable management in tight chassis spaces.
Japanese Capacitors and Intelligent Cooling: The main capacitors use 105℃ Japanese electrolytic capacitors with a 100,000-hour lifespan, paired with an FDB (Fluid Dynamic Bearing) fan that dynamically adjusts via a thermal control chip, achieving "low-load fan stop + high-load silent" operation with noise controlled below 22dB.
Cutting-Edge Compatibility: natively supporting ATX3.1 and PCIe5.1 standards, they feature a 16-pin 12V-2×6 interface, directly powering next-gen GPUs like the RTX 40 series and eliminating losses from adapter cables.
Catering to ultra-small form factor (USFF) systems, GameMax offers the GT-450P BK (80 Plus Platinum) and GT-450G BK (80 Plus Gold) in TFX size (175mm×85mm×65mm), ideal for mini servers and HTPC setups:
Balancing Efficiency and Silence: The Platinum model achieves 92% typical efficiency, paired with an 80mm silent fan that enables "zero noise" operation under low loads via intelligent stop-start technology, with a minimum noise level of 18dBA outperforming most competitors.
Professional Protection Design: Integrated with six protection mechanisms (overvoltage, overcurrent, short circuit, etc.), the supply features a SECC 0.6mm high-strength casing, meeting CE/FCC standards for electromagnetic interference resistance.
Flexible Connectivity: Supports a single PCI-E 6+2pin interface for mid-low-end discrete GPUs, with a 12V CPU power connector to meet high-performance needs in Mini PCs.
The "LLC + DC-DC" topology frequently mentioned in documentation is key to high performance. Take the GS-850G: its APFC + LLC resonant circuit achieves over 90% energy conversion efficiency, combined with a single +12V high-current design (up to 70A). Compared to multi-rail 12V solutions, this reduces wire resistance losses, making it more suitable for combined CPU and GPU loads. The GT-450P's Platinum certification means efficiency exceeds 90%, 92%, and 89% at 20%, 50%, and 100% loads respectively—reaching top industry standards.
Fan Technology: The GS series' FDB fans use fluid dynamic bearings, extending lifespan three times compared to standard oil-sealed fans. Paired with an intelligent thermal curve, they maintain 70% cooling efficiency in 40℃ environments.
Capacitor Selection: Both GS and GT series utilize premium Japanese capacitors (NCC, Teapo, etc.), offering better high-temperature resistance than Taiwanese capacitors, reducing the risk of capacitor swelling in the confined spaces of Mini cases.
Protection Design: Models like the GS-750G include built-in EMI filtering circuits, minimizing electromagnetic interference with motherboards and hard drives to enhance system stability.
A major breakthrough of GameMax Mini ATX power supplies is integrating the latest power standards in a small form factor. For example, the GS-850G's native 12V-2×6 interface delivers 600W directly, meeting the transient power demands of PCIe5.1 GPUs—traditional SFX supplies require adapter cables, posing safety risks. Additionally, ATX3.1 support enables 3x peak power output, handling sudden loads from CPU overclocking or GPU boosting with ease.
Power Consumption Estimation:
Light office/HTPC use: Choose GT-450G (450W) or GS-650G (650W); 80 Plus Gold efficiency suffices for configurations like i5 + GTX 1650.
High-end gaming/mini workstations: GS-850G (850W) supports i9 + RTX 4070 setups, with ATX3.1 preventing power bottlenecks.
Chassis Compatibility:
Standard Mini ATX cases (e.g., Lian Li Q58): Prioritize SFX-form-factor GS series.
Ultra-small ITX cases (e.g., NR200): Opt for TFX-form-factor GT series, confirming chassis power supply bay dimensions.
Additional Requirements:
Silence priority: The GT series' 80mm fan stop-start technology is ideal for quiet environments.
Lighting needs: While some GS models lack RGB, they can sync with chassis ARGB; note that the RGB PRO series in documentation is mostly ATX-form-factor, requiring differentiation.
GameMax's Mini ATX power supply lineup proves that compact power solutions have evolved from "compromised choices" to "technical benchmarks." From the gold-standard efficiency of the GS series to the silent precision of the GT series, these products not only meet performance needs within spatial constraints but also future-proof mini systems through forward-looking technologies like ATX3.1 and PCIe5.1. For builders seeking "small yet powerful" setups, GameMax Mini ATX power supplies represent both a balancing act of size and performance and a comprehensive revolution in power supply experience.
GameMax TFX 450w 80 Plus Platinum PSUs, this active PFC unit runs at a max of 92% efficiency, Silent running 80mm fan with 18 dBA minimum, and Single PCI-E 6+2pin connectors support,
• Finally, there is full electrical protection and official safety is promised
• TFX PSU 450W continuous power output, Active PFC 80Plus Platinum, at 40℃ rated operating temperature for 24/7 operation ensures unwavering power and reliability.AC Input Voltage from 100-240v
• TFX power supply is the most common in brand PC machines.Size: 150*85*65mm, smaller than ATX power supplies
• Strictly according to standard TFX form factor
• High efficiency, small volume.Low-noise fan 80mm
• High efficiency with 92%.Multiple protection including OVP, UVP, OCP, OPP, OTP and SCP, SIP.Safety / EMI Approvals: CE, FCC, CB, UL.Scope of application: TFX power supply is widely used in MINI-ITX computer ITX case, PO, IPC, server, workstation, industrial computers, all-in-one computers, etc
• TFX power supply is mainly used in small equipment, TFX cases, and some HTPC cases.
• 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 850W (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.
