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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

4.7 out of 5 stars 164 customer reviews
| 17 answered questions

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  • ATX12V / EPS12V
  • Modular
  • 80 PLUS GOLD Certified
  • 100 - 240V (Max. 90 - 264V)
  • Maximum Power: 550W
21 new from $87.00 8 used from $78.07
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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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Product Description

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

Product Information

Technical Details

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Brand Name Seasonic
Item model number SSR-550RM
Item Weight 5 pounds
Product Dimensions 6.3 x 3.4 x 5.9 inches
Item Dimensions L x W x H 6.3 x 3.39 x 5.9 inches
Color Black

Technical Specification

Warranty [pdf ]

Additional Information

ASIN B00918MEZG
Customer Reviews
4.7 out of 5 stars 164 customer reviews

4.7 out of 5 stars
Best Sellers Rank #119 in Computers & Accessories > Computer Components > Power Supplies
Shipping Weight 6 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available September 11, 2012

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Product Warranty: For warranty information about this product, please click here [PDF ]

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By D. Alexander TOP 500 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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You only need to look it up on Google for reviews to tell: this PSU is amazing.

I've been building PCs for well over 10 years, and have always found funny how some Builders cram the highest powered PSU their budget allows into their PC. That's not how it works.
You need to know approximately what's the peak power of the PC you're building. Reason? Efficiency. Efficiency suffers the most when a PC is pulling a small amount of power (eg: idle, web surfing, music, youtoubing, office, etc). The lower the percentage of load you're pulling from the PSU from it's total, the less efficient it is, the more money you're not saving on the electricity bill. That's why office PC usually have a 250W-300W PSU.

Secondly: don't bother with 80Plus Platinum/Titanium PSUs just yet. It's 2% and 4% more efficient than Gold at 50% load, but usually come with a hefty price premium over Gold certified PSUs. It would take a lot more years to get the Return on the extra investment, than what you're probablly going to keep the PSU.

With that off the table, let's talk about the PSU. This device is powering an Intel Core i5 based system, overclocked to 4.0GHz, 16GB of RAM, one SSD and one HDD, 5 fans and a GTX760. It has power to spare, while being EXTREMELY quite, and exhaust air is relatively cool compared to older PSUs when gaming.
The cables are flat, which are a godsend for cable management within the case, and a pouch for those extra modular cables you won;t be needing. Comes with a rather large sticker.

Why Seasonic and not higher named (Seasonic is not small by all means) brands like Corsair, Antec eVGA or similar? We can't generalize, but keep in mind that SeaSonic is one of the OEMs for many of the PSUs from those brands. They rebadge, relabel and rename the units, and sell them usually more expensive, adding little to no value. Save yourself a couple of bucks here.
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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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*UPDATE: Third time was a charm. The PSU is in a working nicely. It handles the pull on it with no issue and is nice and quiet. It's a shame it took a few tries.

---------------------------------
I bought one of these as a replacement for an old PSU that died. I received the first one and installed it - nothing. I followed their troubleshooting guide and Jump Start procedures - nothing.

I RMA'd the bad PSU and after eventually got a new one via UPS. This was not a fast process.

Silly me took the new one and installed it and - again nothing. I pulled it out and went through Jump Start and troubleshooting again - nothing.

Welcome to bad product and RMA hell.
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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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solid, stable, quiet, reliable
The only brand I will buy when it comes to power supplies.
My only complaint is the 8pin CPU power cable is too short in cases that are designed for the wiring to be hidden behind motherboard - they need to add about an inch. You can buy extensions, but I shouldn't have to in cases that are mid atx.
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