Is Seasonic G-Series 550W enough for this build?

InS0

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Sep 29, 2014
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Hello, I am currently putting together PC with the following parts:

i5-4690k
MSI GTX 970
ASRock Z97 Extreme4
+ rams and stuff

Will the PSU in title be sufficient? Not really considering to OC my GPU anytime soon.

Btw, what's the difference between the G-Series and S12G? Which one is better?

Thank you :)