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Power Supply

SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply

( 4.8 Average / 39 Ratings )




Part #

M12II 520 Bronze




520 Watts





Efficiency Certification

80+ Bronze


> 87%

PCI-Express 6+2-Pin Connectors


PCI-Express 6-Pin Connectors


Completed Builds Using This Part

See All Completed Builds


Merchant Base Promo Shipping Tax Availability Total
Newegg $54.90 -$10.00 +$6.99 s/h In stock $51.89
$10.00 mail-in rebate
SuperBiiz $56.99 $56.99+
Newegg Marketplace $74.17 +FREE s/h In stock $74.17
Amazon $75.74 Free two-day shipping with Amazon Prime In stock $75.74
( 14 new from $60.98, 3 used from $68.68. Last updated 19 minutes ago. )
B&H $76.45 +FREE s/h In stock $76.45
NCIX US $84.99 $84.99+
* Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

Price History (Excluding Tax & Combo Deals) History:


why510 11 points 22 months ago
from completed build The Brick (The Hotel Build)

Love the fully modular PSUs. Only problem I have been having is it that it seems that the motherboard cord seems a bit fragile. Had to rearrange a couple cords so it would turn on with the case closed.

gazereths 17 points 20 months ago
from completed build From Budget to Beast (ish)

Solid, fully modular and made by Seasonic. Decent price. No issues at all in the 6+ months I've had it.

RaspberryPiFan 29 points 13 months ago
from completed build Raspberry Pi Fan's Steam Machine

I have two of these now. I think that the PSU is the most important part in the computer. Then the motherboard. You need clean power and a quality PCB for your parts to be based on.

RaspberryPiFan 22 points 12 months ago
from completed build My Mother's Office PC.

I really don't have to do another review on this PSU. Everyone knows. Modular, clean power, SeaSonic, blah blah blah.

RaspberryPiFan 23 points 11 months ago
from completed build My Dev Rig

Umm.... What do you think?

xL-Jee- 27 points 11 months ago
from completed build The Little Cube That Could

The only good modular PSU that doesn't cost £75+ It gives good clean power and was recommended by the pros such as JonnyGuru.

tombull89 23 points 10 months ago
from completed build The Orange Box

Excellent value fully modular PSU.

yoorie016 9 points 10 months ago
from completed build Budget Build i3 Skylake

It's the best and well reviewed product! 520w with 80+ bronze that will keep my components well juiced. It has a nice flat styled cables and all of them are black. I think this can also support a single 1080 just in case i upgrade my current GPU.

eagle44445 11 points 7 months ago
from completed build green shitter

its sea sonic, its quiet... dude buy it

devin94x 18 points 7 months ago
from completed build $900 Gaming Budget Build

Fantastic price for a fully-modular PSU. Love SeaSonic.