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The Gamdias HELIOS M2-850B is an 850W ATX power supply carrying 80 PLUS Bronze certification, built for gaming systems that need steady delivery under load. It meets the ATX 3.1 specification and is PCIe 5.1 ready, so current graphics cards and their transient power behaviour are accounted for rather than left to a older-generation unit to absorb.
The Gamdias HELIOS M2-850B is an 850W ATX power supply carrying 80 PLUS Bronze certification, built for gaming systems that need steady delivery under load. It meets the ATX 3.1 specification and is PCIe 5.1 ready, so current graphics cards and their transient power behaviour are accounted for rather than left to a older-generation unit to absorb.

The HELIOS M2 range covers 550W, 650W, 750W and 850W. The 550W and 650W units are 80 PLUS Bronze rated at 85% efficiency, while the 750W and 850W models reach 88% under the same certification. Every unit in the series adds fan speed management for quieter running, ATX 3.1 support and a full set of safety protections.

The HELIOS M2 range covers 550W, 650W, 750W and 850W. The 550W and 650W units are 80 PLUS Bronze rated at 85% efficiency, while the 750W and 850W models reach 88% under the same certification. Every unit in the series adds fan speed management for quieter running, ATX 3.1 support and a full set of safety protections.

The HELIOS M2-850B holds 80 PLUS Bronze certification and reaches up to 88% efficiency, meaning less of the power drawn from the wall is lost as heat before it reaches the components. Lower waste heat also means the unit runs cooler inside the case, which keeps its fan working less hard through long sessions.
The HELIOS M2-850B holds 80 PLUS Bronze certification and reaches up to 88% efficiency, meaning less of the power drawn from the wall is lost as heat before it reaches the components. Lower waste heat also means the unit runs cooler inside the case, which keeps its fan working less hard through long sessions.


Built to the ATX 3.1 specification, the HELIOS M2-850B tolerates power excursions of up to 200%, which is what modern graphics cards demand during brief spikes well above their rated draw. It also holds 60% efficiency at low loads and meets the required power supply timing standards, so idle and light-load behaviour is covered as well as peak.

Built to the ATX 3.1 specification, the HELIOS M2-850B tolerates power excursions of up to 200%, which is what modern graphics cards demand during brief spikes well above their rated draw. It also holds 60% efficiency at low loads and meets the required power supply timing standards, so idle and light-load behaviour is covered as well as peak.

A PCIe 12V-2x6 connector is fitted to the HELIOS M2-850B, the connector standard used by current-generation graphics cards. That removes the need for an adapter stacked out of several 8-pin PCIe leads, and it gives the card a direct, stable feed from the power supply under sustained gaming load.
A PCIe 12V-2x6 connector is fitted to the HELIOS M2-850B, the connector standard used by current-generation graphics cards. That removes the need for an adapter stacked out of several 8-pin PCIe leads, and it gives the card a direct, stable feed from the power supply under sustained gaming load.


The HELIOS M2-850B runs a single high-amperage +12V rail, so the full 12V budget is available to whichever component needs it instead of being split across separate rails. DC to DC architecture handles the minor voltages, holding regulation tight under changing load, and high-grade capacitors support that stability over the life of the unit.

The HELIOS M2-850B runs a single high-amperage +12V rail, so the full 12V budget is available to whichever component needs it instead of being split across separate rails. DC to DC architecture handles the minor voltages, holding regulation tight under changing load, and high-grade capacitors support that stability over the life of the unit.

Cooling comes from a 120mm sleeve bearing fan that adjusts its speed automatically in response to temperature and load. At low draw it stays quiet, and it only ramps when the unit is actually working hard, which keeps the power supply from being the loudest thing in the case during light desktop use.
Cooling comes from a 120mm sleeve bearing fan that adjusts its speed automatically in response to temperature and load. At low draw it stays quiet, and it only ramps when the unit is actually working hard, which keeps the power supply from being the loudest thing in the case during light desktop use.

Everything you need to know about this product
It is an 850W ATX power supply unit.
It is 80 PLUS Bronze certified and reaches up to 88% efficiency.
Yes, it is built to the ATX 3.1 specification and meets the required power supply timing standards.
Yes, ATX 3.1 compliance means it supports power excursions of up to 200%.
Yes, the unit is PCIe 5.1 ready with a PCIe 12V-2x6 connector for current graphics cards.
Yes, it uses a single high-amperage +12V rail for power delivery and broad compatibility.
It uses a 120mm sleeve bearing fan that adjusts speed automatically based on temperature and load.
The unit achieves 60% efficiency at low loads under the ATX 3.1 requirements.
The series is offered in 550W, 650W, 750W and 850W models.
Yes, the HELIOS M2-850B uses Active PFC.
The DC to DC design keeps operation stable and voltage regulation precise as system load changes.
AI-Generated Content:These FAQs are generated by an automated AI system and may contain inaccuracies or omissions. Evetech makes no warranties, express or implied, regarding their completeness or reliability. For definitive information, please refer to the manufacturer's official specifications.









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