M12D 850w Quad GFX Enabled ATX Power Supply

  • Seaonic's best PSU yet - boasting excellent Quad GFX support and superior 12 raid voltage stability.
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Stock Code: CA-012-SS

EAN: 00000000

MPN: M12D-850

Manufacturer: Seasonic

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Product information:

M12D 850w Quad GFX Enabled ATX Power Supply

Behold, the whole new designed of Seasonic M12D modular gaming power supplies, offering a wide range of features you have never seen before, comes with 750 and 850 Watts(ATX12V 2.3V+ EPS12V 2.92 compliant), offers buyers with a high range power output solution with revolutionary improvement to bring your gaming to next level. The new M12D features DC to DC Converter design to provide outstanding dynamic response and greater system stability at the same time.
Today, advanced graphic cards are more popular than ever, Seasonic M12D modular gaming power supplies is capable to deliver with four PCI-E connectors to match NVIDIA or ATI video cards, perfect for personal desktop, high-end gaming applications and for you servers. Along with the exceptional reliable 105oC Japanese made Capacitors to bring longer product life length, Seasonic is honored to work with Sanyo Denki for its San Ace Silent Fan to provide absolutely silent operation to your PC. More importantly, Seasonic M12D series achieved 80Plus Silver certified status with efficiency greater than 85% at 20%, 50% and 100% during operation. Advanced thinking, think Seasonic.
The Seasonic M12D 750W/850W series features DC to DC design capable of maintain system stability in any condition while offering superior dynamic response at the same time. The incorporates Seasonic?s award winning Smart & Silent Fan Control [S2FC] now employed with San Ace Silent Fan to provide best temperature/fan control circuit in the market today.

- Super High Efficiency (90%)
- Ample 12v Dual Rails
- Solid Caps
- Enhanced performance and stability from dual sided PCB
- Detachable Modular Cable
- Ultra Ventilation for maximum cooling
- 5 Year Warranty

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Star Rating

Average customer rating

(from 4 customer reviews)
All Time (4)

Good unit


Ian G 2009-08-25

M12D 850W

That is what I call quality product. Just picking up the box you feel that the stuff inside is well built. fan is really quiet, runs very cool. Also says that it is certified for quad GFX, well I do not know about that but we will see in time :)
Overall top class :)

muziqaz 2009-08-13

Compatibility Issues

This only got 4 out of 5 stars as it seems to be totally incompatible with the Gigabye GA-EX58-UD5 motherboard.

Within a couple of seconds of switching on the PC, all PSU and system fans cut out and the PC fails to POST. I RMAd the first unit and the second did the same.

The PSU works with every other system Ive tried it in, and every other PSU seems to work with this motherboard.

Checking the forums Im not the only one to have experienced this issue.

That said, its very quiet, and the voltages seem rock solid. Its just a shame it doesn't work in the system I want it to.

Jon 2009-08-02


No fancy labeling or pretty colours and theres more cables permanently attached to it than most people would like. But this is a cut above the rest. A truly regal power supply. Its unbelieveable quality, the king of power supplies, and it weighs as much as one in full battle armour. (no seriously this is now 60% of my builds weight)

The Boy Birch 2009-07-16

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