Is a 550W PSU enough for my build?

[Eduardo Da Silveira Cabral]

Hi there, so next month I am going to make my own PC and I am thinking about buying a Seasonic G-Series 550W 80plus gold PSU, however I am afraid that might not be enough for my build, here are the components and their respective power requirements:
Intel Core i7-5820k 6-Core 3.3 GHz 15MB - 140 Watts
ARCTIC Liquid Freezer 120 CPU Cooler - 15 Watts
EVGA Nvidia GeForce GTX 970 Superclocked ACX 2.0 4GB Edition - 170 Watts (requires at least a 500W PSU according to the manufacturer's website)
2x G.Skill Ripjaws V Series 8GB 2133 MHz DDR4 RAM - 11 Watts
MSI X99A SLI - 70 Watts
Western Digital Caviar Blue 1TB EZEX 3.5" 7.2K HDD - 20 Watts
Samsung 850 EVO 500GB 2.5" SSD - 10 Watts
That makes a total of 436 Watts required to run my build, however I hear that sometimes there are peaks in power consumption that might go over the 436 Watts, so I was advised to purshase a PSU that was ate least 50 Watts more power than what was required to power my components, so I think the 550 Watts might be enough but I am not entirely sure if that is a safe purchase or if it is safer to get a 600/620/650 watts PSU or of those are just higher than what it is required even on a high consumption scenario.
Thanks

 

[Corey Schneider]

For $20 more, I'd go with the 650w Seasonic. But i'm a little on the "too safe" side of things. If you get the 650w, you'll probably have more room for CPU overclocking as well. Because I don't really see much of a point in spending the extra dough on one of those haswell-e CPUs just to run it on stock clocks.

 

[Ethan Carlone]

EVGA 650 Gold would be perfect.

 

[turkey3_scratch]

Sounds like you're using a calculator. Don't use those. Your system is about a 350W maximum system, more like 275-300W when gaming. Also, GTX 1070 is out, don't get a 970. And the I7-6800K is coming out very soon, so get that instead of the 5820K.

The Seasonic G Series 550 is perfectly fine.

 

[turkey3_scratch]

EVGA 650 Gold would be perfect.

There are a multiple of those which range form poor quality to mediocre to very good,