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Scan code: LN55705 Manufacturer code: SS-520GM2

Seasonic M12II EVO 520W Modular Power Supply

520W Seasonic M12II EVO Edition, Full Modular, 80PLUS Bronze, SLI/CrossFire, Single Rail, 40A, 120mm Fan, ATX PSU

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Scan code: LN55705 Manufacturer code: SS-520GM2
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Delivery Options
  • By DPD On 6th Apr To 10th Apr to your specified address. | £5.48 Receive SMS with one-hour delivery window Weekend, timed and European delivery options are available at checkout

    Have your parcel delivered by DPD to your specified address. Receive SMS with one-hour delivery window

    Weekend, timed and European delivery options are available at checkout
  • Collect instore Collect from our Bolton store, BL6 6PE | Free

    Order online, collect from our Bolton store (25-28 Enterprise Park, Middlebrook, Horwich, Bolton, BL6 6PE)

  • UPS and DPD Pickup Pickup from local convenience store | £4.79

    Collect your parcel from your newsagents, petrol stations and convenience stores

  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

  • 48HR REPLACEMENT If you need to return this item, your replacement will be dispatched within 2 working days of your product arriving back at Scan. More info
Frequently Bought Together
Product Overview


The M12II EVO series is an upgraded Seasonic product family that supports Intel’s fourth generation of core processors and provides reliable performance for enthusiast seeking 80 PLUS Bronze efficiency. The main features of the M12II EVO series units at a glance are fully modular flat black cables, highly reliable 105°C aluminum electrolytic capacitors, Smart and Silent Fan Control technology (S2FC), ample +12 V output and Seasonic’s 5-year worldwide manufacturer’s warranty.

80 PLUS® Bronze

The 80 PLUS® Bronze certification indicates that a high percentage of the electricity is converted into useful power, therefore there is less heat lost and more money saved on the electricity bill. The 80 PLUS® Bronze certification guarantees greater than 82 %, 85 % and 82 % efficiency at 20 %, 50 % and 100 % operating loads, respectively. Sea Sonic’s Bronze Series is an economical choice with great performance and high built-in value.

Fully Modular Cables

In Sea Sonic’s patented design feature full modularity comes hand-in-hand with the extensive use of SMD technology to increase the overall performance and reliability of this power supply. The simple and inventive layout scheme helps to attain unsurpassed quality and performance, where efficiency is further enhanced by minimized line resistance, reduced voltage drop and lower impedance. Reduced component count and better space utilization facilitate optimal air flow inside the case and promote heat dissipation, proper cooling and ultimately longer product life.

S2FC - SMART and Silent Fan Control

The intelligent thermal circuit feature is designed to find the optimal balance between the necessity to cool the components and the need to run the power supply in the most silent manner possible.

Fluid Dynamic Fan Bearing

High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are extremely reliable and generate considerably less operating noise and heat than ball bearing fans. The lubrication of the bearing surface reduces friction and vibration and therefore lowers overall power consumption. Due to the effortless, quieter rotations and its robust construction, this reliable fan technology also greatly increases the lifespan of the fan.

How It Works

When the fan shaft rotates, high pressure oil drifts along the grooves of the bearing sleeve to generate a thin layer of lubrication between the bearing faces. As the speed increases, so does dynamic oil pressure and the shaft is lifted from the bearing to create smooth, effortless rotations. The herringbone shape of the groves helps to efficiently channel the lubricant and avert leakage.

• 80 PLUS® Bronze certified
• Fully Modular
• Tight Voltage Regulation
• 105 °C Japanese Capacitor
• S2FC - Smart and Silent Fan Control
• Multi-GPU setup
• Gold plated connectors
Size ATX
Edition M12II EVO
Wattage 520 W
80 PLUS Certification 80 PLUS Bronze
Max. Efficiency (at 230Vac) 80 %
Cooling Fan
Fans 1 x 120mm
Internal +12V Rails Single Rail
Rail 1 +12V 40 A
Rail 2 +12V N/A
Rail 3 +12V N/A
Rail 4 +12V N/A
Rail 5 +12V N/A
Rail 6 +12V N/A
Max. Combined Output +12V 40 A
Modular Yes
Modularity Full Modular
SLI/CrossFire Yes
EPS 12V Yes
Motherboard Connector 20+4-pin
  • 1 x 4+4-pin CPU +12V (EPS)
  • 1 x 4-pin FDD Power
  • 5 x 4-pin Molex
  • 2 x 6+2-pin PCIe
  • 6 x SATA
Dimensions 150 x 86 x 160 mm (WxHxD)
Package Type  
Additional Information
Scan Code LN55705
Model Number SS-520GM2
GTIN 4711173872566

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

60 months
Return to base
DOA Period:
7 days
RTB Period:
60 months
Manufacturer Contact Details
Seasonic / Scan
0871 472 4747
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TekSpek Guides
Power Supplies
Power Supplies
Date Issued: 25th Oct 2017

Power-supply units, or PSUs, are an integral part of any computer build. Often overlooked, it is the component that is likely to last the longest, and it can be moved between systems when you upgrade to the latest and greatest in the future.

Read More

520W Seasonic M12II EVO Edition, Full Modular, 80PLUS Bronze, SLI/CrossFire, Single Rail, 40A, 120mm Fan, ATX PSU is rated 4.7 out of 5 by 7.
Rated 5 out of 5 by from 520W Seasonic Evo Power Supply Appears to be a great product at great price. Was looking for ages until I stumbled across this modular power supply, which meant less cable routing. Speedy delivery from Scan.
Date published: 2020-01-07
Rated 5 out of 5 by from Excellent product Easy to install and came with all cables required and various cable connection types to cover all applications
Date published: 2020-01-01
Rated 5 out of 5 by from Perfect for my NAS Server plus extras Fast delivery and perfectly packaged. Works fantastically in my new home server as needed all those SATA power connections. Would recommend for anyone needing the power and connections. Great for the price!
Date published: 2019-12-10
Rated 5 out of 5 by from Good quality PSU from a very reputable manufacturer I purchased this PSU to replace my old Antec Neo 550 PSU, as the power socket on it fouled the case. Luckily the socket on this PSU didn't cause the same problem. The unit is well built, and comes with a large array of cables that should cover a well equipped system. Also, being fully modular, you can replace a cable should it get damaged. My only negative comment on this PSU, would be the flat cables. This is because they can be a bit of a pain to route, which is definitely something I found easier with the braided cables on my old Antec PSU. This can be remedied however, by purchasing aftermarket cables, which are generally individually braided, and very easy to route. These are also good if you want the inside of the PC to look good, as various colour options are available online. Overall, I would definitely recommend this PSU. I have not owned a Seasonic PSU until now, but there is definitely an element of quality with it. I have no doubt it would power a good spec'd system, without breaking into a major sweat. Of course as with any components, check compatibility, number of connectors etc. before buying.
Date published: 2018-05-05
Rated 4 out of 5 by from An excellent value, fully modular PSU. I have previously bought Corsair CX-series for my desktop builds, but was reccomended Seasonic as they were listed as a Tier 1 PSU. A £60 500W fully-modular power supply is a pretty good introduction for me, and I was quite impressed. Fully modular is a definate advantage, but be aware the secondary power connector for the motherboard has 2x 4-pin connectors, so if you only have one 4 pin connector it will leave a connector flapping about. Apart from that, it's quiet, it runs the 230w R9 380x without issues, and I'm pretty happy with what I got.
Date published: 2016-06-03
Rated 4 out of 5 by from Great PSU! I brought one of these for a customer’s PC and what a great little thing for the price. The power supply looks nice and performs to that as well. As it’s a Seasonic I trusted it as they OEM a lot of PSU for the different manufactures and it lives up to that reputation. The only gripe I have with this unit is the 20 + 4 pin connector for the motherboard as it and normal mesh type sleeving. This makes the connector really hard to bend and bit of a battle to get into the motherboard end but this a recurring problem for most PSU's. But other than that one issues a great unit and the flat black un-sleeved cables for the rest of are great and a breeze to cable manage. Great unit form an ever reliable manufacturer.
Date published: 2014-11-05
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Questions & Answers

Is this PSU compatible with Haswell-era CPUs?

Asked by: WattsvilleBlues
Yes, absolutely. It would do the job very well. Just be sure to check ratings if you are going to be using a high model i7 and a powerful GPU(s).
Answered by: alex2468
Date published: 2018-07-07
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Seasonic M12II EVO 520W Modular Power Supply
Seasonic M12II EVO 520W Modular Power Supply