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FSP Twins 500W Redundant Power Supply Review

Manufacturer: FSP Technology Inc.

Introduction and Features

In this review we are going to take a detailed look at FSP Technology Inc.’s new Twins 500W redundant power supply. It’s been quite a while since we reviewed a redundant power supply in the ATX form factor. This should be interesting! (Actually, it turned out to be very interesting, along with a few surprises we didn’t expect).

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The FSP Twins 500W redundant power supply is targeted towards use in home and small businesses for mail or web server systems that require maximum up time. The Twins 500W PSU incorporates two 520W modular power supplies inside one standard ATX housing. Under normal operation the two power supplies operate in parallel, sharing the load. If one of the power supply modules should fail, the other one automatically takes over with no down time. And since the power supply modules are hot-swappable, a faulty unit can be replaced without having to turn off the system.

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FSP claims the Twins 500W is a server-grade power supply designed to deliver stable power and is certified 80 Plus Gold for high efficiency. The ATX chassis measures 190mm (7.4”) deep and is fitted with fixed, ribbon-style cables. Each modular power supply uses a 40mm fan for cooling and the Twins 500W comes backed by a 5-year warranty. Users can also download and install FSP’s Guardian software to monitor power input, power output, and efficiency, along with other parameters in real time if desired.

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FSP Twins 500W Redundant PSU Key Features:

•    ATX PS2 redundant size ideal for mail, web and home server
•    Server-grade design provides stable power
•    Hot-swappable modules design
•    80 Plus 230V Internal Gold certification
•    Digital-controlled power supply supports FSP Guardian monitoring software
•    Smart power supply supports Alarm Guard and status LED indicators
•    Flat ribbon-style cables with two 4+4 pin CPU connectors
•    Complies with ATX 12V and EPS 12V standards
•    Protections: OCP, OVP, SCP, FFP (Fan Failure Protection)
•    5-Year Manufacturer’s warranty
•    MSRP: $399.00 USD

Please continue reading our review of the FSP Twins 500W PSU!!!

FSP Technology Inc. has been designing and building PC power supplies under their own brand since 2003. Not only do they market power supplies under their own FSP name but they are the OEM for many other brands. FSP also manufactures a full line of server-style power supplies so it is logical they would use modular power supplies in the design of the Twins Series.

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Here is what FSP has to say about the new Twins Series power supply: “The Twins Series is an ATX size redundant power supply, without front bracket, it is compatible for most PS2 chassis. It is an ideal power supply unit solution for startups, small and medium-sized businesses web or mail server systems, semi-industrial application. It is also the best power supply unit for intelligent home computer station.

Different from the general power supply units, Twins series is a redundant power supply with two power modules. In normal situation, these two power modules will automatically share the load for optimum efficiency; while one fails, the other module will immediately take over the whole load. Twins can guarantee your PC system under a stable power supply situation.

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January 30, 2017 | 11:09 AM - Posted by Anonymous (not verified)

Do most redundant server PSUs operate in this fashion or keep one on standby?

January 30, 2017 | 12:03 PM - Posted by Anonymous (not verified)

Most of them can be configured to act either as a 1+1 (failover) or a 2+0 (both live).

January 31, 2017 | 05:17 AM - Posted by Anonymous (not verified)

If this cant be configured to be 1+1 then its kind of pointless.

I currently use a high end Seasonic with a APC UPS for reliability.

January 30, 2017 | 04:54 PM - Posted by Anonymous (not verified)

Whats the point of this? Really high price? I dont see the purpose for desktops. Better get an 1000Watt PSU single/

January 30, 2017 | 07:37 PM - Posted by Brox

Redundancy is the point of this.

January 31, 2017 | 04:08 PM - Posted by Anonymous (not verified)

Redundancy is exactly the point of this. I will most likely be buying 15 of them. Have been waiting for something like this forever!

When your production machines are 10,000$ per hour per line, having a power supply go out can cost thousands.

February 1, 2017 | 01:02 PM - Posted by LegoGuy (not verified)

So I've known that redundant PSU's have been standard in rack-mount cases for a long time, so what's the use-case for using these in standard ATX machines?
Rendering boxes, or other such machines?
I just legitimately don't know.

February 3, 2017 | 10:47 AM - Posted by Lee Garbutt

Anytime you have a PC running a mission-critical app or controlling high-value process equipment, you want to maximize up time by minimizing any potential hardware failures, like the PSU. I used to work in Bio-tech R&D and we frequently used redundant PSUs along with large UPSs on mass spec instruments and PCs running High Throughput Screening robotic systems. Any down time could cost thousands of dollars per hour.

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