Categories: Power supply units

FSP Raider 550w


A lot of companies are in the PSU game, which is why it’s important to make sure the one you’re buying is a good one. Or at least, one that won’t damage your system. Because that can happen with a cheap unit and while here at XSR we might not have all the fancy testing facilities of the bigger boys, we can make sure that yours won’t overload your components at the first opportunity.

So today I’m looking at the FSP Raider, the 550w baby version. Let’s throw it into our test setup and see how it gets on.

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  • +12V Single Rail Design
  • SATA Array Cable Design
  • 120mm Quite Fan
  • All Series come with PCI-E 6+2 Pin Connectors
  • FSP MIA ICTM Inside
  • 80 PLUS® Silver Certified, efficiency > 88%
  • Complies with ATX 12V 2.31 & EPS 12V 2.92 Version
  • Active PFC, power factor ≧ 99%
  • Complete Protections : OCP, OVP, OPP, SCP, UVP
  • Full Safety Approved


Model RA550
Efficiency 88%
Input Voltage 100-240Vac
Frequency 50-60Hz
PFC Active PFC (0.99)
Power Provided 550W
Over-Current Protection V
Over-Voltage Protection V
Short-Circuit Protection V
Line Type/ Main connector 20+4Pin*1
EPS 12V 4+4 pin Connector 1
4 pin Floopy Connector 1
SATA Connector 6
4 pin Molex Connector 3
PCI-E 6+2 pin Connector 2
Case Color black
Chassis Fan 120mm
Noise <21 dBA
Form Factor ATX 12V V2.31 & EPS 12V V2.92
Safety Approval CE, FCC, CB, UL/CUL, TUV, BSMI, CCC, GOST, C-tick
Dimensions(Lx W x H)mm 150 x 140 x 86


The packaging is pretty standard. This is far from a premium unit, but not everyone wants £10 worth of packaging around their expensive product, they want the product and that’s it.

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Nice to see a UK plug for once. So often these things come with an EU kettle lead and you have to go and buy a converter.

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The unit itself is a pretty bog standard one. It’s got a matt black paint job, the usual honeycomb grill at the rear and a standard black fan. It’s all stuff you’ve seen before, but the point here is keeping the price down and functioning correctly. That said, it doesn’t look bad, it just looks standard.

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The main cables are braided, but the SATA and Molex 4pin connectors aren’t, which seems a shame. Braiding makes cable routing much easier and surely they can’t cost much to add?

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The top or bottom – depending on which angle you look at it – has the usual specifications sticker. It’s about the only thing that breaks up the PSU’s styling.

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CPU: Core i5 750 @ 4GHZ
Motherboard: Asus P7P55D-E
GPU: Sapphire 5850 1GB
RAM: Corsair Dominator 4GB PC3-12800 DDR3
Storage: Samsung F3 500GB 16MB 


Here at XSReviews, we don’t have the money for a full test bench when it comes to PSUs. Load testers cost thousands of pounds which unfortunately we just don’t have. Because of this, we don’t pretend to test the rail stability or efficiency of a PSU, as we simply can’t do it effectively.

However, what we can do is test the Ripple/Noise quality of each rail using an oscilloscope. The one used was USB Instruments Stingray DS1M12 using HP 3060 probes and also in line with ATX specifications, I used 10uF and 0.1uF capacitors to simulate added load. On top of that, Furmark was run with all settings cranked to their maximum to make sure there was some real load too.

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Noise / Ripple Results

For a rundown of what noise/ripple is and why it’s important to test it, check out my explanation in this review here.

For reference however, we don’t want the 3.3v or 5v rails going over 50mv, or the 12v rail to go over 120mv. Ideally we want to see results under half of those figures.

The figure to note in the following images is the peak-peak voltage, the second reading.


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Good to see that none of the rails for the FSP Raider are perfectly healthy and shouldn’t cause any problems if you too picked one up.



Well this is a pretty standard looking unit. It’s got a basic paint job, basic cable management features, no modularity. But it’s only £50 and you get 550w. I’d recommend you check out some other reviews for efficiency and the like, as that’s not something we can check here. However we can confirm the Raider 550w is fine for noise/ripple.


Noise/ripple test is passed
Simple design
Reasonable price


Boring looking
No fancy features, no modular cables, standard paintjob

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