Scan code: LN86906 Manufacturer code: SSR-550PD2

Seasonic PRIME Ultra 550 Watt Fully Modular 80+ PLATINUM PSU/Power Supply

550W Seasonic PRIME Ultra, Fully Modular, 80PLUS Platinum, SLI/CrossFire, Single Rail, 45A, 135mm Fan, ATX, PSU

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Scan code: LN86906 Manufacturer code: SSR-550PD2
Order now and get it tomorrow, Tue 11th Aug
From £9.88 / month (APR 14.9%)
Monthly Payment: £9.88
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £109.99
Total inc. interest: £118.49
If you are approved for a credit limit with PayPal Credit and use it for future purchases, the APR for those purchases won't be more than 19.9% and may be even lower.

Representative Example:

Purchase Rate: 19.9% p.a. (variable)

Representative: 19.9% APR (variable)

Assumed Credit Limit: £1,200

Subject to status. Terms and Conditions apply.
Delivery Options
  • By DPD On 11th Aug to your specified address. | £5.48 Receive SMS with one-hour delivery window Weekend, timed and European delivery options are available at checkout

    Have your parcel delivered by DPD to your specified address. Receive SMS with one-hour delivery window

    Weekend, timed and European delivery options are available at checkout
  • Collect instore Collect from our Bolton store, BL6 6PE | Free

    Order online, collect from our Bolton store (25-28 Enterprise Park, Middlebrook, Horwich, Bolton, BL6 6PE)

  • UPS and DPD Pickup Pickup from local convenience store | £4.79

    Collect your parcel from your newsagents, petrol stations and convenience stores

  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

  • 48HR REPLACEMENT If you need to return this item, your replacement will be dispatched within 2 working days of your product arriving back at Scan. More info
Product Overview

PRIME Ultra Platinum

Its ultra-high efficiency and outstanding performance are the fine results of Seasonic’s continuous commitment to innovation and advancement. Improved low-load efficiency, highly suppressed ripple noise and a generous 12-year manufacturer’s warranty are just some of the characteristics that set these series apart from other power supplies on the market.

New In Prime Ultra

Seasonic has included a PSU tester in the box that will let consumers perform a quick and easy jump start on the power supply. Each PRIME Ultra Series power supply will also ship with a SATA 3.3 adapter to support the “Power Disable” (PWDIS) feature of the newer, high-capacity hard drives. The inline capacitors on the cables were removed, which takes away the bulkiness inside the system. To maximize flexibility, the 180-degree SATA connectors ensuring more flexibility and easier installation.

80 Plus® Platinum

The PRIME Platinum Series achieves 80 PLUS® Platinum certification with its 92 % efficiency at 50 % system load.

Micro Tolerance Load Regulation

Seasonic’s latest design keeps the output voltage within a very tight range, achieving under 0.5 % load regulation. This impressive electrical performance and stability makes this power supply an ideal choice for high-performance systems.

Premium Hybrid Fan Control

Seasonic’s vast experience in designing the most silent and efficient power supplies on the market was translated into the development of Hybrid Mode; a state-of-the-art fan control that enables users to keep the overall fan noise at the lowest possible level.

Fluid Dynamic Fan Bearing

High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are extremely reliable and generate considerably less operating noise and heat than ball bearing fans. The lubrication of the bearing surface reduces friction and vibration and therefore lowers overall power consumption. Due to the effortless, quieter rotations and its robust construction, this reliable fan technology also greatly increases the lifespan of the fan.

How It Works

When the fan shaft rotates, high pressure oil drifts along the grooves of the bearing sleeve to generate a thin layer of lubrication between the bearing faces. As the speed increases, so does dynamic oil pressure and the shaft is lifted from the bearing to create smooth, effortless rotations. The herringbone shape of the groves helps to efficiently channel the lubricant and avert leakage.

Cable-Free Connection Design

Seasonic’s engineers have implemented a new design feature, where instead of cables; the back panel and the PCB (Printed Circuit Board) are connected by a copper plate. This breakthrough solution not only lowers the chance of production errors during manual insertion but it also improves output power quality.

• 80 PLUS® Platinum certified.
• Micro Tolerance Load Regulation (0.5 %).
• Cable-free Connection Design.
• Premium Hybrid Fan Control - Fanless until 40 % load.
• Multi-GPU setup.
• Gold plated connectors.
• 12 years warranty.
Size ATX
Edition PRIME Ultra
Wattage 550 W
80 PLUS Certification 80 PLUS Platinum
Max. Efficiency (at 230Vac) 92 %
Cooling Fan
Fans 1 x 135mm
Internal +12V Rails Single Rail
Rail 1 +12V 45 A
Rail 2 +12V N/A
Rail 3 +12V N/A
Rail 4 +12V N/A
Rail 5 +12V N/A
Rail 6 +12V N/A
Max. Combined Output +12V 45 A
Modular Yes
Modularity Full Modular
SLI/CrossFire Yes
EPS 12V Yes
Motherboard Connector 20+4-pin
  • 1 x 4+4-pin CPU +12V (EPS)
  • 1 x 4-pin FDD Power
  • 3 x 4-pin Molex
  • 2 x 6+2-pin PCIe
  • 6 x SATA
Dimensions 140 x 86 x 150 (WxHxD)
Package Type Retail
Additional Information
Scan Code LN86906
Model Number SSR-550PD2
GTIN 4711173873853

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

120 months
DOA Period:
30 days
RTB Period:
12 months
Manufacturer Contact Details
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TekSpek Guides
Power Supply units
Power Supply units
Date Issued: 28th Apr 2020

Power-supply units, or PSUs, are an integral part of any computer build. Often overlooked, it is the component that is likely to last the longest, and it can be moved between systems when you upgrade to the latest and greatest in the future.

Read More

550W Seasonic PRIME Ultra, Fully Modular, 80PLUS Platinum, SLI/CrossFire, Single Rail, 45A, 135mm Fan, ATX, PSU is rated 4.5 out of 5 by 4.
Rated 5 out of 5 by from An excellent PSU A quiet unit (can't hear it over the case fans), a superb 12yr warrantee! Prime Ultra units have been found by professional review sites to have excellent build quality and excellent electrical performance. Compared to my old Corsair TX650 80+ basic rated PSU, it's pulling 17w less from the wall (running [email protected] on all 12 threads of my Ryzen 5 3600), wall draw is now 112w with that load. Only downside of this unit is the current cost, because I run my PC 24/7 it'll pay itself back in 5 yrs, but it's still annoying to have paid £10-15 more than 1-2 mths ago! (according to skinflint). Anyway, it's a pity they've stopped making the 550w unit, if you're in this market segment, get one while you can! Oh, and delivery and service by Scan was very good :)
Date published: 2020-07-13
Rated 5 out of 5 by from Good Quality PSU I was building a new PC, and I wanted to use top quality parts with specs to upgrade as required in the future. I particularly wanted a Seasonic PSU because of their reputation. I appreciate there are cheaper options, but these are high quality. I ordered this from Scan, and it was delivered about 20 hours later. Extremely well packaged - absolutely no problems. I completed the build over the next couple of days, and everything works perfectly. I would recommend this power supply, and I would certainly recommend Scan. Will definitely use again.
Date published: 2020-02-21
Rated 5 out of 5 by from My first Seasonic power supply... I usually buy platinium Corsair... 1200w for dual card editing, or a normal 750w.. this time I decided to get a 550w for a fast i9 9000k daily driver I built. With Noctua fans and this beauty the box is silent... solid craftmenship... years of use on a daily driver adds up so why not get something efficient and 100% trust worthy. 10/10... As for my next dual card edit box... I will probably get another one of these with more power.
Date published: 2020-01-07
Rated 3 out of 5 by from Over Hyped, but seems well designed The Good It seems very well designed It is very quiet I imagine it will last well, but It's early days to comment on reliability for a product with a 12 year warranty. The Bad a) The Marketing team claim "Seasonic has included a PSU tester in the box" The Truth - it's not a "tester" it's just a plug with two pins bridged - scan sell something similar for under £2. It doesn't in itself test anything - it might just be useful for testing if you had the right equipment. If I had known I would have bought the Seasonic Focus+ which other than a marginally shorter warranty seems nearly the same & £20 cheaper. (To be fair Scan offered to replace it but losing the PSU for probably 4 days and the extra work swapping in and out isn't worth it) b) it only has 6 SATA power connections. I want to use this for a 24/7 server - for which it would seem ideal. I can't get an answer as to whether I can get additional Seasonic SATA connections to use instead of the Molex or FDD connectors. (I knew this pre-purchase)
Date published: 2019-01-23
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Questions & Answers

how many PCie cables?

description say 2x 1xPCIe 6+2 pin one cable with 2 connectors? no really crossfire/SLI friendly as description! or 2 cables with 1 connector?
Asked by: noquiero
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Seasonic PRIME Ultra 550 Watt Fully Modular 80+ PLATINUM PSU/Power Supply
Seasonic PRIME Ultra 550 Watt Fully Modular 80+ PLATINUM PSU/Power Supply