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Aimed at budget and mid-range gaming PCs, the GAMDIAS HELIOS M1-650B puts out 650W through fixed cables and follows the ATX12V v2.4 standard. GAMDIAS rates it 80 Plus Bronze and quotes efficiency of up to 85%. A 120mm hydraulic bearing fan, flat black cables and five protections come with it, and active PFC holds a 0.99 power factor.
Aimed at budget and mid-range gaming PCs, the GAMDIAS HELIOS M1-650B puts out 650W through fixed cables and follows the ATX12V v2.4 standard. GAMDIAS rates it 80 Plus Bronze and quotes efficiency of up to 85%. A 120mm hydraulic bearing fan, flat black cables and five protections come with it, and active PFC holds a 0.99 power factor.

The M1-650B follows the ATX12V v2.4 standard and measures 150 x 140 x 86mm. Its black housing has a round fan guard on top, gold-coloured stripes framing the HELIOS M1 650B name on the side, and the AC inlet at the back.

The M1-650B follows the ATX12V v2.4 standard and measures 150 x 140 x 86mm. Its black housing has a round fan guard on top, gold-coloured stripes framing the HELIOS M1 650B name on the side, and the AC inlet at the back.

Cooling comes from a 120mm hydraulic bearing fan behind a round, ringed guard. Its speed follows the temperature and the load, so it spins down when the system is idle or lightly loaded. GAMDIAS lists no silent or fan-stop mode for this model.
Cooling comes from a 120mm hydraulic bearing fan behind a round, ringed guard. Its speed follows the temperature and the load, so it spins down when the system is idle or lightly loaded. GAMDIAS lists no silent or fan-stop mode for this model.


The rear panel holds the AC inlet and the power switch, next to a honeycomb vent. GAMDIAS lists the AC input as 100-240V at 5-10A and 47-63Hz, a wide range for one unit. Support for the CPU's C6/C7 low-power states is included as well.

The rear panel holds the AC inlet and the power switch, next to a honeycomb vent. GAMDIAS lists the AC input as 100-240V at 5-10A and 47-63Hz, a wide range for one unit. Support for the CPU's C6/C7 low-power states is included as well.

The side label pairs the HELIOS M1 650B name, in white and gold, with an 80 Plus Bronze badge. GAMDIAS rates the unit 80 Plus Bronze and quotes up to 85% efficiency. Higher efficiency means less of the power drawn from the wall turns into heat inside the unit.
The side label pairs the HELIOS M1 650B name, in white and gold, with an 80 Plus Bronze badge. GAMDIAS rates the unit 80 Plus Bronze and quotes up to 85% efficiency. Higher efficiency means less of the power drawn from the wall turns into heat inside the unit.


Every cable is fixed to the M1-650B and exits as one flat black bundle. Flat, flexible cables bend more easily during routing and leave more space for air to move through the case. The bundle carries one 4+4-pin CPU connector for the motherboard.

Every cable is fixed to the M1-650B and exits as one flat black bundle. Flat, flexible cables bend more easily during routing and leave more space for air to move through the case. The bundle carries one 4+4-pin CPU connector for the motherboard.

Of the 650W total, the +12V output is rated at 48A, or 576W, for the CPU and the graphics card. The +3.3V and +5V outputs are rated at 18A each and share 100W, and the +5Vsb standby output is rated at 2.5A.
Of the 650W total, the +12V output is rated at 48A, or 576W, for the CPU and the graphics card. The +3.3V and +5V outputs are rated at 18A each and share 100W, and the +5Vsb standby output is rated at 2.5A.

The fixed cables carry one 20+4-pin motherboard connector, one 4+4-pin CPU, two 6+2-pin PCIe, five SATA and three Molex connectors. There is no 12V-2x6 or 12VHPWR cable, and the unit follows ATX12V v2.4 rather than ATX 3.1. OVP, UVP, OPP, OCP and SCP protect against over-voltage, under-voltage, over-power, over-current and short circuits.
The fixed cables carry one 20+4-pin motherboard connector, one 4+4-pin CPU, two 6+2-pin PCIe, five SATA and three Molex connectors. There is no 12V-2x6 or 12VHPWR cable, and the unit follows ATX12V v2.4 rather than ATX 3.1. OVP, UVP, OPP, OCP and SCP protect against over-voltage, under-voltage, over-power, over-current and short circuits.
Everything you need to know about this product
650W covers most single-GPU builds with a mid-range graphics card. Check your graphics card maker's recommended PSU wattage; the M1-650B feeds the card through two 6+2-pin PCIe connectors.
GAMDIAS rates it 80 Plus Bronze with up to 85% efficiency, and it uses active PFC with a 0.99 power factor.
Its 120mm hydraulic bearing fan adjusts its speed to temperature and load, so it slows down at light loads. GAMDIAS lists no silent or fan-stop mode.
Over-voltage, under-voltage, over-power, over-current and short-circuit protection (OVP, UVP, OPP, OCP and SCP).
No. GAMDIAS lists it as ATX12V v2.4 with no 12V-2x6 or 12VHPWR cable; it has two 6+2-pin PCIe connectors. For a graphics card with a 16-pin socket, the HELIOS P2-750G V2 has a native 12V-2x6 cable.
1x 20+4-pin motherboard, 1x 4+4-pin CPU, 2x 6+2-pin PCIe, 5x SATA and 3x Molex, all on fixed (non-modular) flat cables.
Both are 650W, 80 Plus Bronze and non-modular. Per GAMDIAS, the M2-650B adds ATX 3.1, an 845W peak rating, a 54.1A +12V rail (M1: 48A), a second CPU connector and over-temperature protection, while the M1-650B has a hydraulic bearing fan, one more SATA and one fewer Molex.
For a budget or mid-range gaming build that needs one CPU connector and two PCIe connectors, it gives 650W, an 80 Plus Bronze rating, active PFC and a hydraulic bearing fan. For an ATX 3.1 build, look at the HELIOS M2-650B.
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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