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Seasonic FOCUS PLUS Gold (FX) 650W PSU Review

Manufacturer: Seasonic

Introduction and Features


Seasonic is in the process of overhauling their entire PC power supply lineup. They began with the introduction of the PRIME Series in late 2016 and are now introducing the new FOCUS family, which will include three different series ranging from 450W up to 850W output capacity with either Platinum or Gold efficiency certification. In this review we will be taking a detailed look at the new Seasonic FOCUS PLUS Gold (FX) 650W power supply. And just to prove that reviewers are not being sent hand-picked golden samples, our PSU was delivered straight from inventory.

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The Seasonic FOCUS PLUS Gold series includes four models: 550W, 650W, 750W, and 850W. In addition to 80 Plus Gold certification, the FOCUS Plus (FX) series features a small footprint chassis (140mm deep), all modular cables, high quality components, and comes backed by a 10-year warranty.

•    FOCUS PLUS Gold (FX) 550W: $79.90 USD
•    FOCUS PLUS Gold (FX) 650W: $89.90 USD
•    FOCUS PLUS Gold (FX) 750W: $99.90 USD
•    FOCUS PLUS Gold (FX) 850W: $109.90 USD

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Seasonic FOCUS PLUS 650W Gold (FX) PSU Key Features:

•    650W Continuous DC output at up to 50°C (715W peak)
•    80 PLUS Gold certified for high efficiency
•    Small footprint: chassis measures just 140mm (5.5”) deep
•    Micro Tolerance load regulation @ 1%
•    Fully-modular cables
•    DC-to-DC Voltage converters
•    Single +12V output
•    Multi-GPU Technology support
•    Quiet 120mm Fluid Dynamic Bearing (FDB) cooling fan
•    Haswell support
•    Active Power Factor correction with Universal AC input (100 to 240 VAC)
•    Safety protections: OPP, OVP, UVP, OCP, OTP and SCP
•    10-Year warranty

Please continue reading our review of the FOCUS PLUS 650W Gold PSU!!!

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Here is what Seasonic has to say about their new FOCUS PLUS 650W Gold PSU:

Due to its small form factor the FOCUS PLUS Gold 650W power supply is a great solution for those who want to build smaller systems and care about the airy arrangement inside their computer case. The fully modular cables are easy to install, save space inside the computer case and provide ample customization and upgrading possibilities at the same time. This mid power range power supply is not only small, but mean too. It boasts the highest power density in its class and it also has remarkable stability and output characteristics during operation.”

Video News

July 3, 2017 | 03:11 PM - Posted by JReese

Good read - and good to see Seasonic on top of their game yet. I'm due for a new build soon and this looks like a really good option.

My main gaming PC is running a 10 year old Seasonic M12 SS-600HM and it's still going strong through a couple board/CPU upgrades and multiple graphics card upgrades.

July 3, 2017 | 03:18 PM - Posted by Donald Trump (not verified)

It is good that PSU manufacturers understand that the 230 mm power supplies of half a decade ago are not really needed anymore. Sure, it may look cool to some because they believe bigger to be better, but a short power supply for anything under a kilowatt is just fine given proper design.

July 4, 2017 | 03:07 AM - Posted by Cyric (not verified)

I just need a reason to change my 7 year old seasonic that is serving its 3rd build.. But am feeling guilty of replacing a perfectly good, reliable and working PSU that has no problems.. Damn you Seasonic.

July 10, 2017 | 01:37 AM - Posted by HERETIC (not verified)

Well done Seasonic-you set the standards by which
others are measured............

July 14, 2017 | 09:37 AM - Posted by Sandwall (not verified)

The box art is making me hungry for chips.

November 2, 2017 | 11:25 AM - Posted by MNaydenov (not verified)

This PSU seems to be of insane value as it is smaller, better AND cheaper then the Corsiar RM650x!

November 24, 2017 | 09:20 PM - Posted by Mike Wilson (not verified)

"our PSU was delivered straight from inventory." On front page yet last page says "Our thanks to Seasonic for sending us the FOCUS PLUS 650W Gold PSU to review!" Guess they are getting the cherry picked samples.

December 27, 2017 | 06:42 PM - Posted by Rag (not verified)

It ordered by Seasonic from reseller's stock... Good job Sherlock to find out nothing... ;)

April 18, 2018 | 10:32 PM - Posted by Maurice Fortin (not verified)

650RM vs 650FX, 650RM "old model" is better than the "new" 650FX

the old had more available cables such as 4+4 attached for cpu power and an extra 1x8 12v for cpu as well, this way here you did not need buy a higher wattage PSU that you will not need for nothing.

some builds that you may have an extra powerful cpu you may not have need of an extra power gpu, but even than, 450w of power is quite a bit of juice for even a very high end core i7 overclocked as well as pretty much any modern AMD or Nvidia graphics card (single one at least) in an overclocked state, so 54a 12v is plenty really, this saves you from having to buy an adapter for the extra cpu power (which quite a few motherboards are now using)

Seasonic is top quality bar none, but, it seems they took a hit on functionality "upgrading" from the semi-modular 650RM to the full modular 650FX, not quite as much in the 3v or 5v rails as well as a few cable change but also costing on average a little bit more $.

glad I bought the well, the cables that are not modular 99% of the time you will be using them anyways ^.^

April 26, 2018 | 12:33 PM - Posted by FredgHar (not verified)

Hello, do you have maybe cab;e pinout for focus plus series?

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