Problems by using an overkill PsU

Eliminator21

Reputable
May 11, 2014
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Hi guys! I am about to build my Pc so I search the best price. My build was originally with an TX650v2 and a 200r

But I found a really good deal on a case with a PsU at first I thought it was not a good psu but its antec hcg 900 on a cheap case that has no usb nor cable management but good airflow :D
What are the problems of using an overkill psu?
Should I buy it?

My pc
I5 4570
H97 d3h
R9 280x
So I need a good 550W unit but this is 900W which is really high, at least I won't have issues xfiring but I don't intend to

The case is a antec 600 it costs around $110