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Power Supply

SeaSonic - S12II 520 W 80+ Bronze Certified ATX Power Supply

( 4.7 Average / 23 Ratings )




Part #

S12II 520 Bronze




520 W



Efficiency Certification

80+ Bronze


> 87%


+3.3V@24A, +5V@24A, +12V@40A, -12V@0.8A, +5VSB@2.5A

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
SuperBiiz $54.99 +FREE s/h $54.99
Amazon $58.11 Free two-day shipping with Amazon Prime In stock $58.11
( 8 new from $58.11, 1 used from $48.54. Last updated 4 hours ago. )
Newegg Business $52.12 +$5.99 s/h $58.11
Newegg $54.99 +$5.99 s/h In stock $60.98
* 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) History:


Zveir 15 points 43 months ago
from completed build Madres Mini ITX

Best budget PSU I've encountered.

g0vernor 15 points 39 months ago
from completed build Straight outta Hoth

Silent, and has all the necessary connectors for a single gpu setup.

sith10110 2 points 36 months ago

Keeps quiet/cool, and a great value psu.

PhamQu 49 points 32 months ago

This PSU is actually a bit old, and I was concerned about that a bit. However, it functions well, and I managed to tolerate the mess that are non-modular PSU's.
Came with some velcro strips and wires were wrapped nicely. Just wish the wires themselves were also sleeved black instead of factory condiment colors.

tbobvh 6 points 32 months ago
from completed build Can't think of any name

While being Bronze certified it is still a very solid psu with good parts in it. Its not modulair but I can just hide my cables in my case because i wont see it so no issue there. Also I haven't heard any fan noise.

CogInTheWheel 13 points 31 months ago
from completed build The Redeemer: My First PC Build

Wanted to go for a stable high quality PSU. Works good and is silent enough!

Ellen_orangecloud 4 points 30 months ago
from completed build Type Y1 (First Build)

It's a Seasonic. It's $60. It's tier 2 in the list. JUST GET IT.

TheSuspect777 9 points 28 months ago
from completed build Swaz

No issues. Surprisingly handles a 1070 and a 6700k.

hensonoftofu 4 points 23 months ago
from completed build First Build, White & Blue Edition

Getting the job done.

Migz09 8 points 22 months ago
from completed build Red Supremo (Ryzen Budget Build)

A nice psu, no issues with it right now, and a bang for the buck