Will this power supply hold my system?

[nightynight]

I'm building a new computer and I think of keeping my old power supply, which is seasonic 620w s12ii bronze 80+ which has served me well for the past year and a half

My specs will be:
I7 4790K + noctua d15
Asus z97 deluxe
Corsair platinum dominator 2x8 2400mhz
Hd7970 which will be replaced in the future
256Gb SSD + 3 HDDs

I will be overclocking all the components.
Will my current power supply be enough to hold this system?

 

[herrwizo]

More than enough. It is a top-quality unit.

Since it is not Haswell-certified, all you need to do with your new build is to turn off C6/C7 power states in BIOS and you are all good.

 

[ak47jar3d]

It should do just fine at stock speeds. If you Overclock, you might challenge it's ability to produce the wattage necessary. I would recommend a 750w for your configuration overclocked (cpu + gpu).

 

[McDuncun]

No prob with that man... That is a very very good PSU! Go do it! Oh yeah and do what Herrwizo said...

 

[McDuncun]

It should do just fine at stock speeds. If you Overclock, you might challenge it's ability to produce the wattage necessary. I would recommend a 750w for your configuration overclocked (cpu + gpu).

Dude don`t look so depressed... Either way he will do fine with a 620w/w overclock...

 

[Rookie_MIB]

Well, let's do some basic math:

i7 - 90 watts
7970 - 200 watts
SSD - negligible
3HD - approx 5-7 watts each depending on model (20watts max - under normal conditions, startup draw could be higher)
Mobo - maybe 50w? Hard to tell.

Still, total comes out (under load, stock clocks) to 360 watts or so. Figuring that your Seasonic is rated for 620 watts, and highest efficiency normally comes at about 50% load, under -stock- clockings your PSU is almost ideally suited to your system.

Now, overclocking could potentially double your CPU wattage, but that would still only take it to 460watts, or about 75% of the PSU units maximum rated load. Also, there are still some other little loads here and there (fans, lights, etc) but those are pretty nominal unless they're server grade components (I have a server fan which is rated at 2.7A draw @ 12v - or about 30 watts by itself... lol).

So - overall you should be fine. Nominal loading (non-oc) would be roughly 360 watts (58% load), overclocked loading would be roughly 450 watts (75% load).

 

[nightynight]

Rookie, with all due respect I think you're wrong.
The devils canyon takes up to 150 watts while overclocked, and the 7970 up to 400 watts full system load. (I took this information from benchmarks) and like I said I will be overclocking all the parts.
Thanks everyone for your answers, but please take a look again, are you sure there will be no issues?

 

[Rookie_MIB]

Rookie, with all due respect I think you're wrong.
The devils canyon takes up to 150 watts while overclocked, and the 7970 up to 400 watts full system load. (I took this information from benchmarks) and like I said I will be overclocking all the parts.
Thanks everyone for your answers, but please take a look again, are you sure there will be no issues?

As for the CPU, I figured that into it. The i7-4790k is rated at 90 watts by Intel, and as I mentioned, I factored in an additional 90 watts for overclock.

The HD7970 is a bit more of an unknown factor because it depends on a full -system- power measurement -but- the card as it sits -stock- is a 200w card. Seeing as they bin the chips to be able to run as high as they can (so they can charge more for 'premium' setups) while running very stable, there isn't a whole lot of headroom left. Some, yes, but not a lot. I figured that 200 watts would be about right, and even if it were 10% low (220 watts) you'd still have more than enough headroom that it shouldn't be an issue.

If you're talking about '400 watts full system power' that means whatever benchmark they were using, they measured the -entire system draw- from the wall (CPU, drives, video card, everything). So, even if you have a magically stable cpu/video pair that can even handle 500w 'full system power' you're -STILL- going to be ok.

A while back I was running a pair of R9-270x video cards with a Phenom II (oc'd to 4.0ghz) for litecoin mining on a 650w PSU. The Phenoms are nowhere near as efficient as the Intel chips, and a pair of 270x's certainly draws more power than a single HD 7970. But, I had zero problems even though I had far more actual draw with only 30 more watts of supply.

I say you have enough for an Intel setup with a single GPU, easily. Even overclocked, you're technically out of the sweet spot for efficiency, but not overloading the PSU as you're only at about 75-80% draw.

 

[Dark Lord of Tech]

A Radeon HD 7970 Ghz Edition needs 31 amps on the 12v+ rail and a 550w power supply with 1 - 6 PIN and 1 - 6+2 PIN PCIE power connections.

Your PSU meets the requirements.