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Seasonic S12II 430 BRONZE ; SS-430GB 430W SLI ATX12V Power Supply

4.6 out of 5 stars 46 customer reviews

Price: $63.67 & FREE Shipping. Details
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  • Supports latest Intel & AMD processors
  • Support Vista System
  • Support SATA interface
  • Over Power Protection
  • Over Voltage Protection
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$63.67 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Seasonic S12II 430 BRONZE ; SS-430GB  430W SLI ATX12V Power Supply
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Technical Details

  • Brand Name: Seasonic
  • Model Number: S12II 430 BRONZE ; SS-430GB

Product Description

Seasonic S12 II SS-430 GB 430W SLI ATX12V Power Supply

Product Information

Product Dimensions 9.8 x 8.5 x 4 inches
Item Weight 5.4 pounds
Shipping Weight 5.1 pounds (View shipping rates and policies)
ASIN B002A17OG0
Item model number S12II 430 BRONZE ; SS-430GB
Customer Reviews
4.6 out of 5 stars 46 customer reviews

4.6 out of 5 stars
Best Sellers Rank #724 in Electronics > Computers & Accessories > Computer Components > Power Supplies
Date first available at Amazon.com May 12, 2010

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Customer Reviews

Top Customer Reviews

By D. Alexander TOP 500 REVIEWER on September 15, 2012
Verified Purchase
This is one of best power supplies available at this price for a quiet build. My original S12 430 is still silently powering a build from 2006. The S12 II is, if anything, even more impressive, and all the reviews suggest reliability should remain a strong point. JonnyGuru tested the 520W version and rated it 9.7 of 10 for power delivery.

The five general parameters for a PC power supply are efficiency, wattage, noise, size, and cable modularity.

EFFICIENCY:

Fifteen years ago, most power supplies were about 70% efficient. For a 100W load, they would draw about 140W from the wall. Not anymore. We now have five major PSU ratings: 80 Plus, 80 Plus Bronze, Silver, Gold, and Platinum. These correspond to half-load efficiencies of 80%, 85%, 88%, 90%, and 92%. Efficiencies at 1/5 and 4/5 load are about 4% less than half-load.

This is an 80-Plus Bronze unit capable of 87% efficiency. Relative to a Gold unit, for a 24/7/365 system draw of 100W, you could expect to spend about $6 a year more in power costs at $0.12/kWH. Efficiency has other benefits, though: there's less heat to dissipate. Less efficient units require a faster, noisier fan.

WATTAGE:

This is a 430W unit. PSU fans generally run at idle speed until actual draw is about half the rated wattage. After that, the fan (and noise) ramps up. Optimal efficiency occurs at about half the rated capacity. Loads under 15% of rated capacity have poor efficiency. The optimal capacity choice would position idle load over 15% (for efficiency) and maximum load under 75% (for noise).

Idle draw for a recent, basic system without a fast video card is about 50W. Full load is perhaps 150W. With a fast video card and additional drives, idle load can be 100W and full load nearer to 350W.
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Verified Purchase
Works fine out of the box, quiet fan, fairly cool, 430 watts is more than enough power for ordinary PC's that aren't loaded up with extra parts such as those for heavy gaming or video work and multiple displays; we'll see how long it lasts compared to other PSU's I've had. I got this to replace a Cooler Master that had both fan & capacitor failures after the warranty expired, and chose Seasonic because their PSU's have more positive reviews than many others - their ball bearing fans and high-quality electrolytic capacitors are big pluses over other brands that use sleeve bearing fans & cheap caps and then don't provide tech or parts support, as I can testify from experience: when I asked another brand's support people for a new fan (simple to replace) or at least its specs so I could order a substitute, they refused to help with the feeble excuse that the insides of their PSU's are "secret". No more purchases from them!

This PSU has a testing characteristic that owners and repair shops should be aware of: while unconnected to a computer and being checked on a bench with a power supply test tool, the very small power loading of the tester resulted in its showing an out-of-tolerance 10%-low voltage reading on the 3.3V rail only; however, when the PSU was plugged into a PC with a normal power load, then the 3.3V was good (this kind of voltage error under a light-load test may or may not show up in other models and makes, depending upon the design of their regulator circuits).
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Verified Purchase
I purchased this power supply to replace my 5 year old squealing Antec power supply. I was intrigued by the 80 plus bronze rating since my old power supply didn't have that. I was also impressed by the 5 year warranty and had always heard that Seasonic was a good power supply manufacturer.

The power supply is super quiet. That's one of the main reasons I bought this one. Being the nerd that I am, I plugged my PC into my Kilawatt with the old power supply in it and then compared it after installing the new one. My findings were that the old power supply used 6w in standby where this one only used 1w. My PC at idle was 98w with the old power supply and is now 88w. This is on an older system with an old Q6600 processor a fairly weak, low wattage video card. It's just used for work, no gaming. If you have a high powered video card, you'll want more than a 430 watt power supply, which Seasonic does make.

Amazon was the seller on this. I got it in 2 days as I paid for and it was well packaged as always.
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Verified Purchase
I have three of these power supplies and I love them. Super-quiet and reliable. Solid five-stars until Intel released their latest processors for 2013.

So I ordered another one for my latest build. The processor is an Intel i7-4770 (released in 2013, codename Haswell). What I didn't realize that it is not compatible with Haswell's low-power state that reduces power need to 0.05 watts. The work-around is to disable the low-power C6/C7 state in the BIOS. Minus one star.
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Verified Purchase
I like this PSU even though I bought it used and had to do a lot to clean it up. This has been a really good PSU for my i5 and MSI r7 365, standard HD, SSD drive, gigabyte 1150 UD3 board and 16GB's of RAM plus water cooler, and 5 system fans. Thus far I haven't had any blue screens or instability as a result of this PSU that I can tell. I wish I could say the same for my trashy MSI GPU...
I've put this PSU through its paces and like a good Seasonic PSU it hasn't let me down even with power fluctuations. This is despite the fact that it arrived to me in nasty shape (literally stunk like rat urine covered in dust) and shipped in a bubble wrap bag. I was deeply worried this unit would be severely damaged from that episode but to my surprise its fired right up and ran fine even without its PSU cable which the character I bought it from also failed to include(surprise surprise). I like this PSU but only get it if you can find it for the right price as it is after all a bronze unit but a good one.
It'll stomp most of the competition but just be aware of its limitations and that its not going to outdo a Seasonic gold rated PSU or have the amps for an intense dual GPU configuration. One should also keep in mind this unit is NOT modular so you'll probably have a fair amount of connectors left at the bottom of the case if this bothers you you might want to look for something else.
The case is also your standard flat black box so no frills there either. However the cables are sleeved which I like and are of good lengths and the connections themselves seem solid. The fan is of good quality and keeps the unit relatively cool while staying quiet.
It also comes with all the proper quality PSU safety features and good regulation overall.
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