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Item#: N82E16817151073

SeaSonic S12II 330 Bronze 330W ATX12V v2.3 80 PLUS BRONZE Certified Active PFC Power Supply

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  • ATX12V v2.3
  • 80 PLUS BRONZE Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@18A, +5V@20A, +12V1@17A, +12V2@17A, -12V@0.8A, +5VSB@2.5A

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Sea Sonic Electronics introduces the S12II “Bronze” Series; the updated version of the award winning S12II Series to meet the growing demand for high efficiency and yet price competitive power supplies. The S12II Bronze Series achieves the 80 PLUS Bronze standard of at least 82%, 85% & 82% power usage efficiency at 20%, 50% & 100% operating loads respectively. This, combined with Active Power Factor Correction, enables the S12II Bronze to reduce energy waste, boost power efficiency and more importantly, reduce the energy costs for the users.

In addition to the efficiency upgrade, the S12II Bronze Series maintains the strong foundations of the S12II series. Important features such as the stable and proven Double Forward Converter circuit design, the industry leading Smart and Silent Fan Control (S2FC) and the use of high reliability Japanese brand capacitors are all carried forward to the “Bronze”.

The S12II Bronze Series, similar to its predecessors, is available in the standard ATX Form Factor and in wattages that are most common for a PC system. In addition to the all-in-one cabling design, this 330W model comes with enough long connectors including four SATA, six peripheral and one 6-pin PCI-E for mid-range computer system.

  • newegg 80 PLUS Bronze Certified The 80 PLUS Bronze certified power supply provides high power efficiency of at least 82% at any load between 20% and 100%, saving your money on your electrical bill, reducing heat in your computer's system and prolonging its life.
  • newegg 330W Power with Ample +12V Outputs A max power of 330W with single enhanced +12VComb.@24A rail delivers safe, reliable output for a mid-range CPU and graphics card as well as other components.
  • newegg Japanese Brand Capacitors The SeaSonic S12II 330 Bronze utilizes highly reliable Japanese brand capacitors for exceptional stability and product lifespan.
  • newegg Efficient Cooling with 12cm Cooling Fan and S²FC The SeaSonic S12II 330 Bronze features a 12cm ball bearing cooling fan coupled with honeycomb construction for increased overall airflow and heat dissipation in the power supply enclosure. SeaSonic’s exclusive S2FC (Smart, Silent Fan Control), combining with soft-mount rubber cushions, helps the fan run quieter and more efficient for the optimal balance between noise and cooling.

Learn more about the SeaSonic USA S12II 330 Bronze

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the SeaSonic USA S12II 330 Bronze

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  • Scott J.
  • 6/15/2010 10:39:09 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWill Probably Buy Another

Pros: Quiet, steady performance. I will probably use this in the next system I build soon.

Cons: None.

1 out of 1 people found this review helpful. Did you? Yes No

  • Wei H.
  • 5/20/2010 9:58:39 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsCool&Quite

Pros: 80plus is great. Idles at 50W, Max 100W. Runs very quite and does not generate much heat at all.

Cons: too many molex connectors, which only cause clutter in a small case. Not Modular.

Other Thoughts: Should have gone with a lower Wattage psu, i'm not even using 1/4 of the 380Watts.

AMD 405e 45Watt
Gigabyte MA785GMT
4GB DDR3 1600
1 40GB SSD
1 WiFi PCI

Did you find this review helpful? Yes No

  • Michael F.
  • 3/12/2010 4:31:49 PM
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsI saved 40 watts

Pros: I am using it in a PC for running Folding@home with 3 dedicated Nvidia GeForce GT 240 cards. When running the more difficult work units, my old 350 watt power supply that came with the case (about 5 years old) used 220 watts. The SeaSonic S12 under the same conditions uses only 180 watts. It will pay for itself in a few years.

Also, it is much quieter. And the current rating on the 12 volt side gives 24 amps total, greater than the 16 amps in the 350 watt supply. I think that solves a problem of occasional lock-ups I was getting. The older power supplies put more current in the 5 volt supply, but more current on the 12 volt supply is what you need for video cards now.

Cons: None at the moment, though an additional 6-pin PCIe power connector might be nice for future upgrades.

Other Thoughts: This is the second SeaSonic S12 330W I have bought, and both run very well.

Note that the 12 volt supply is rated at 288 watts total, which provides a maximum of 24 amps as noted above. But it is split into 2 separate 12 volt supplies, one for the 24 pin connector and the other for the 4 pin connector on the motherboard. These are limited to 17 amps each, but the total should not exceed 24 amps.

2 out of 2 people found this review helpful. Did you? Yes No

  • Marc-Andre C.
  • 2/17/2010 10:40:31 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggs330W is enough!

Pros: High quality power supply. First impression was that it's heavy, I think it's good sign for a PSU :) 120mm fan bring extra ventilation to the case and it's near silent.


Cons: Cables are not removable but I knew when I purchased it.

Other Thoughts: Great for any standard PC, I use it with a quad core + 4 hard drive. Unless you have video cards in SLI and/or 12 hard drives, 330w will do the job. I still dont understand why people are buying 1000W power supply when they dont need it!

4 out of 4 people found this review helpful. Did you? Yes No

  • Anonymous
  • 2/16/2010 7:42:32 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsQuiet

Pros: It's quiet, roughly half as loud as the power supply it replaced.

5 year warranty and a good track record from the company.

Cons: It's relatively quiet but not silent. Not a big con, it is not advertised as a silent model.

Other Thoughts: Come with instruction card on how to RMA and a case badge.

SeaSonic actually manufactures the power supply. This is not a third party company.

Did you find this review helpful? Yes No

  • Michael R.
  • 2/4/2010 9:02:44 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsQuiet, 5 year warranty, efficient

Pros: I've had the best luck with SeaSonic power supplies and their new 80plus energy saving models are even better. This thing is virtually silent in normal use and improved my system efficiency about 10% over the power supply that came with the case. Not over rated (see below).

Cons: Doesn't have modular cables, but at this price, I wouldn't expect them. I'd rather they put the money in the internal components.

Other Thoughts: Most people buy a larger PS than they need and they waste energy. A 450 watt PS will use more energy running a 150 watt PC than a 330 watt PS will. The more lightly loaded a supply is, the *less* efficient it is. So don't buy one bigger than you really need. Few systems anymore besides extreme gaming rigs or servers with large disk arrays need more than 330 watts. My quad core system with 8 GB of ram, a high-end ATI video board, 2 hard drives, 2 optical drives maxes out at under 200 watts. Even the CPU/video card reviews back this up. It's rare any of their PC's draw more than 200 watts even at full load during benchmark testing and extreme gaming.

4 out of 4 people found this review helpful. Did you? Yes No

  • steve t.
  • 1/28/2010 6:36:41 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsworks great with the Antec P180 case

Pros: Works great in my Antec P180 case. Connected a legacy IDE hard drive, IDE optical drive, and the two case fans all with one cable. The SATA hard drive is on another.

5-year warranty card is included in the pkg. The SS web site has a picture.

Pkg. includes 4 screws and a y-adapter. Used one branch for a legacy floppy drive, which I tested and then disabled in my MB's BIOS.

The SS web site suggests that solid-state capacitors are used, but I didn't check.

Haven't had any noise problems, even though the fan is blowing air out the back.

Cons: While the 4-pin peripheral connectors have the easy swap feature, the SATA connectors do not, and they are not easy to remove. NB: do not squeeze the easy swap tabs while inserting, they are supposed to be squeezed when removing.

Cables are a bit too stiff to straighten easily. Not a real problem though.

Other Thoughts: Bought a SeaSonic Super Tornado 300 in 2003. It came with a fan that would not reliably start. The retailer (not NE) sent a replacement fan which I installed. In early 2004 the PSU would start and almost immediately shut down. SS handled the RMA very efficiently, and the replacement worked flawlessly from then on. Bought the new one as part of an upgrade that needed a more modern PSU (24-pin main power,SATA power).

Did you find this review helpful? Yes No

  • 12/13/2009 10:15:05 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsVerfied PF and Eff.

Pros: The power factor is indeed close to 0.99 - 1.00. The efficiency is great. PSU is quiet.
Highly recommended.

Cons: None

Did you find this review helpful? Yes No

  • Anonymous
  • 11/20/2009 5:26:50 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggscool and quiet

Pros: I replaced an old 300W w/ this one. Instantly cooler and quieter. Perfect for my HTPC.

Cons: None so far.

Other Thoughts: More cables than I needed for my HTPC, but that's probably a plus for most users.

Did you find this review helpful? Yes No

  • Craig M.
  • 10/19/2009 6:20:09 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsQuiet, high-quality

Pros: Very quiet. Other reviewers have complained about the noise, I'm very picky about fan/system noise, this PSU really is quiet by my standards.

High build quality. Heavy, good finish, every connector is in a cable mesh, and every molex has a device that makes it easier to insert/remove. Compared to other PSUs by major vendors, many of which are actually manufactured by SeaSonic, this unit looks to be much higher build quality.

Good efficiency. Could be better (e.g., 80+ gold), but I understand that at this price point it's hard.

Cons: Could be cheaper. One can always wish.

3 out of 3 people found this review helpful. Did you? Yes No

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Item#: N82E16817151073
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