SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply OR Corsair CSM 550W 80+ Gold Certified Semi-Modular ATX Power Supply
Definitely the seasonic, its leagues ahead of that corsiar psu, all corsair psu's are terrible for there price besides the ax series.
The CS550M is actually a decent unit. Jonnyguru liked it so much it was in his personal rig for a while (he upgraded to the higher wattage CS850M later, but if he likes it, you know that the CS series has to be pretty good). The CX series is trash, but the AX (as you mentioned) and CSM units are very solid.
not sure why they'd rate it that. It's a pretty good unit. Probably not as good as the SeaSonic one he listed, but if you're looking for a more efficient unit for a similar price, it's a good unit.
the cx is good for a low end power supply. the S12II is good for a mid range power supply.
The CS (the unit in question here, different from the CX) is similar in quality to the Seasonic.
It might just be that individual unit had a defect, because the JonnyGuru reviews on the CS550M and CS850M showed no major flaws with either unit.
Vagabond couldn't be more right, the Corsair one is trash. Sure it's "higher" efficiency, and is modular, but the quality is just garbage for what you're paying.
It's actually pretty good. Read the summery of the jonnyguru review on it. His main gripe was the price, which has gone down significantly since the time of that review.
copied from his review:
excellent voltage stability,
no problems with 80 Plus Gold efficiency,
excellent minor rail ripple suppression
not very competitive price
merely average 12V ripple suppression
Compared to a Seasonic though...I think I'd trade away the modularity for it.
Depends. The reality is that both are pretty good units, and you're not likely to notice the difference. Seasonic offers the M12 II series, which is semi modular, for a slight price premium, so that's also an option.
SeaSonic S12II 620W 80+ Bronze is my option.