FSP Raider 550w

Power supply units


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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Last modified: December 22, 2016

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