Mars Gaming MPB850PSIW 850W Power Supply

850 W · 80+ Gold · Fully modular

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Wattage 850 W
Efficiency 80+ Gold
Modular Fully modular
Form factor ATX

Mars Gaming MPB850PSIW 850W Power Supply is a 850 W power supply rated 80+ Gold (fully modular). Pick one with some headroom above your build's draw. It came out in 2025.

Released: 2025-07-21

Specifications

Key specs

Wattage: 850 W
Efficiency: 80+ Gold
Modular: Fully modular
Form factor: ATX
Released: 2025-07-21
Part number: MPB850PSIW
EAN / UPC: 8435693111498

Power

Total power: 850 W
AC input voltage: 200 - 240 V
AC input frequency: 47 - 63 Hz
Input current: 8 A
Power factor: 0.9
Power Factor Correction (PFC) type: Active
Combined power (+3.3V): 120 W
Combined power (+12V): 850 W
Combined power (+5V): 120 W
Combined power (-12V): 3.6 W
Combined power (+5Vsb): 12.5 W
Max output current (+3.3V): 18 A
Max output current (+12V): 70.8 A
Max output current (+5V): 18 A
Max output current (-12V): 0.3 A
Max output current (+5Vsb): 2.5 A
Efficiency: 90%
Power protection features: No load operation, Over current, Over power, Over total voltage, Over voltage, Overload, Short circuit, Under voltage

Ports & interfaces

Motherboard power connector: 24-pin ATX
Number of SATA power connectors: 5
Peripheral (Molex) power connectors (4-pin): 3
EPS power connector (4+4 pin): Yes
PCI Express power connectors (6+2 pin): 3
PCI Express power connectors (12-pin): 1
ATX Power connector (24-pin): Yes
Cabling type: Fully-Modular

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Performance

80 PLUS certification: 80 PLUS Gold
Purpose: PC
Power supply unit (PSU) form factor: ATX
ATX version: 3.1
Noise level: 12 dB
Bearing technology: FDB

Design

Product colour: White
Cooling type: Active
Fan diameter: 14 cm
Number of fans: 1 fan(s)
Fan location: Top
On/off switch: Yes

Weight & dimensions

Width: 150 mm
Depth: 160 mm
Height: 85 mm
Weight: 1.7 kg

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About this product

MPB850PSI Power Supply The MPB850PSI is a fully modular 850W ATX 3.1 power supply, engineered to deliver maximum efficiency, reliability, and silence for high-performance builds. Featuring 80PLUS Gold certification, 105ºC Japanese Toshin Kyogo capacitors, DC-DC technology, and a 140mm SI Extreme Silence fan, it ensures stable power delivery, ultra-quiet operation, and clean, optimized installation. Its native 12V 2x6 connector with PCIe 5.1 support guarantees seamless integration with next-gen GPUs. Professional Power. Absolute Silence. - 850W high-performance power - 80PLUS Gold certified - Native 12V 2x6 connector with ATX 3.1 & PCIe 5.1 support - 10-year warranty Professional Safety with 10-Year Warranty Equipped with a full suite of electronic protections (OCP, OVP, OPP, OTP, OLP, NLO, PFP, UVP, SCP, and TCP), the MPB850PSI safeguards your most sensitive components. Available in two versions Black and white Choose the one that best suits your setup 80PLUS Gold Certified Efficiency With over 90% energy efficiency, the 80PLUS Gold certification ensures lower power consumption and reduced heat output.

Datasheet (PDF)

MPB850PSIW vs similar power supplies

	Mars Gaming MPB850PSIW 850W Power Supply	Mars Gaming MPB850PSI 850W Power Supply	COUGAR GES 850	Gigabyte GAMING 850GM PG5 ICE Power Supply Unit PCIe 5.1
Wattage	850 W	850 W	850 W	850 W
Efficiency	80+ Gold	80+ Gold	80+ Gold	80+ Gold
Modular	Fully modular	Fully modular	Fully modular	Fully modular
Form factor	ATX	ATX	ATX	ATX
Released	2025	2025	2026	2026