Cheap brand psus allways have a possibility of poping and burning the rest of your parts, so therefor it's better to pay for a quality psu rather than paying for your hardware again.
If you look at page 2 on the reviews you can see that the psu died after 2 days.
And before you say "But it's only 400W", well, that generic is probably only 300W before it gets flakey, and will probably blow up within a year of buying it.
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