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  • SeaSonic G Series  550-Watt ATX12V/EPS12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply SSR-550RM
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SeaSonic G Series 550-Watt ATX12V/EPS12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply SSR-550RM

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List Price: $121.85
Price: $89.99 & FREE Shipping. Details
You Save: $31.86 (26%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
  • ATX12V / EPS12V
  • Modular
  • 80 PLUS GOLD Certified
  • 100 - 240V (Max. 90 - 264V)
  • Maximum Power: 550W
3 new from $89.99 12 used from $71.60

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Frequently Bought Together

SeaSonic G Series  550-Watt ATX12V/EPS12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply SSR-550RM + WD Blue 1 TB Desktop Hard Drive: 3.5 Inch, 7200 RPM, SATA 6 Gb/s, 64 MB Cache - WD10EZEX + Asus 24x DVD-RW Serial-ATA Internal OEM Optical Drive DRW-24B1ST (Black)
Price for all three: $169.79

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Special Offers and Product Promotions

  • Buy Used and Save: Buy a Used "SeaSonic G Series 550-Watt ATX12V/EPS12V SLI Read...” from Amazon Warehouse Deals and save 41% off the $121.85 list price. Product is eligible for Amazon's 30-day returns policy and Prime or FREE Shipping. See all Used offers from Amazon Warehouse Deals.

Product Details

  • Product Dimensions: 6.3 x 3.4 x 5.9 inches
  • Shipping Weight: 5.9 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B00918MEZG
  • Item model number: SSR-550RM
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (66 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: September 11, 2012

Product Description

SeaSonic G Series SSR-550RM 550W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply

Customer Questions & Answers

Customer Reviews

4.7 out of 5 stars
5 star
55
4 star
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1 star
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See all 66 customer reviews
It is very quiet.
Skiter
The modular cables are a nice plus, as they keep the airflow clean inside the case.
Renifer
SeaSonic has one of the best reptuations for power supply manufacturers.
ViolentMetaphor

Most Helpful Customer Reviews

59 of 64 people found the following review helpful By D. Alexander TOP 100 REVIEWER on January 31, 2013
This is a top-drawer power supply for a system with one powerful graphics card or two mid-range cards. It's efficient, silent at loads under 300W, and delivers clean performance at a reasonable price.

PERFORMANCE:

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 and 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 Gold unit capable of 90% efficiency. Relative to a Bronze unit, for a 24/7/365 system draw of 100W, you could expect to save about $6 a year in power costs at $0.12/kWH. Efficiency has other benefits: namely, every watt that isn't going the system is dissipated as heat. Less efficient units require a bigger or faster fan, which makes more noise.

JonnyGuru and XBitLabs have given this model high marks for load regulation and current ripple. It's a solid design that's par for the course for Seasonic.

NOISE:

Most power supplies have two general characteristics: they're most efficient at half-load, and half-load is when their fans start to ramp up. If you want a silent PSU, your maximum load should be no more than 60% of rated capacity.
Read more ›
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7 of 7 people found the following review helpful By J. God on October 16, 2013
Verified Purchase
Owned for a couple months now, pretty impressed with the performance on this 550 watt Power Supply. I wasn't expecting to be able to overclock a 780 GTX and an i7 920 on this, expecting to run into power limit but this does the trick. I knew I was making a good decision getting a nice efficient 550 watt instead of wasting money/energy on a bloated 800 watt model. Very solid.
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5 of 5 people found the following review helpful By Sootaek Woo on April 28, 2013
Verified Purchase
Super Quiet!! It's little expensive, but it's worth it!
My desktop is super quiet!! If you have stressed out with fan noise, this is the right product for you.
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3 of 3 people found the following review helpful By Calvin Hodgson on October 13, 2013
Verified Purchase
So far this has been running in a new system I got for about 3 months. Old generic PSU I had would make a constant crackle noise between the power cord and where you plug it into the PSU. Decide that I did not want a fire hazard waiting to happen so I got this.

This power supply really does live up to its 80+ Gold certification. Playing games on the old unit there would be lots of heat the would billow out. Now with the SeaSonic I cannot even feel the massive amount of head unless it has been a long time playing games or if it is hot in the room. I don't want to bore you with technical details and I really don't know much about them, but SeaSonic focuses only on Power Supplies. I expect this to last for at least 10+ years before quitting.

System Specs
Intel Core i7-860 2.8GHz 95W
Kingston 8 GB RAM
ASrock P55 Extreme
Windows 8 Pro 64-bit (6.2, Build 9200)
Saphire ATI Radeon 6870

I did buy this from Amazon warehouse deals and it was missing the power cord. Contacted support and they were able to give me a partial refund for the item missing.
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3 of 3 people found the following review helpful By Huy N. on July 6, 2013
Verified Purchase
Im powering a Radeon 5870 (with 2 monitors), mobo ud3h, 2x 8gb Memory, 3fans, Bluetooth dongle, keyboard/mouse dongle, usb speaker, wifi network card, memory card reader, Wacom tablet and 4x external HDs. Hasn't skipped a beat.

This thing is quiet! you'd only really hear something if you had your ear right next to it.

Ive become a fan of SeaSonic.
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3 of 3 people found the following review helpful By tonyman on April 19, 2013
Verified Purchase
I put this unit into a Silverstone mid-tower with a Gigabyte FM2-socket micro ATX motherboard and a bunch of SATA drives and two SATA DVD/Bluray drives. This was my first experience with a PSU with (mostly) modular cabling, and I like the idea and this implementation; it cleaned up the case and sped things up a bit. In use, the supply seems quieter than the Thermaltake TR2-430W it replaced. The sytem has been operating stably so far... I like it!
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3 of 3 people found the following review helpful By Waleed on March 24, 2013
Verified Purchase
All of the capacitors are solid made in Japan & Taiwan as I read in most reviews & articles.
The noise level for the fan is very quiet.
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1 of 1 people found the following review helpful By Sameer on May 12, 2014
Verified Purchase
Enough to power a GTX 780 Ti and Core I5-3570k with a couple mechanical drives and an SSD. Which is as much as I'll need with future more power efficient CPU's and GPU's.
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