What power supply wattage should I get?

[R-T-B]

I agree completely - and at at least 40°C, if not 50°C too.

But that said, it is very rare for the load of any computer to sit at 100% (or any value) for extended periods of time in "real-world" scenarios. Benchmark and stress test programs do, and perhaps some folding type programs, but even while gaming, the load is always varying.

And yes, a primary goal of the hardware industry is greater efficiency and they are making great strides at that. Let the tree huggers rejoice!

The move is towards SSDs which are more efficient than HDs. DDR4 is more efficient than DDR3. CPUs are more efficient too. Not too sure about graphics cards, however - simply because they tend to be so much more powerful these days. Pound for pound, they may be more efficient. But a 1000lb efficient gorilla still eats more bananas than a 500lb inefficient gorilla.

Fermi still holds some world class power consumption records. It's generally been dropping in tdp since.

Radeon HD29XX was pretty bad too.

 

[NdMk2o1o]

EVGA Supernova 550gs Gold owner here and notoriously power hungry R9 290x and no issues so a good 550w is more than enough to handle a low TDP card like the 1070

 

[EarthDog]

250W for a single gpu flagship seems to have held steady for a couple gens now(780ti on forward?) while the upper midrange on down seems to be going down...

 

[jboydgolfer]

EVGA Supernova 550gs Gold owner here and notoriously power hungry R9 290x and no issues so a good 550w is more than enough to handle a low TDP card like the 1070

Those EVGA power supply's r fantastic huh?
I was so surprised it handled my build with SLI 970 didn't even break a sweat, I guess I wasn't all that surprised because I knew the quality was top notch.
But then again I've been pretty lucky with power supplies, most recently I had a corsair CX 600 that ran beautifully for over five years , with a 2500 K overclocked 4.8 GHz 24/7

 

[Beastie]

750W is overkill. High wattage PSUs are generally less efficient at low watts than lower wattage PSUs.

500W will be fine, go 650W if you really want to go belt and braces .

I'd spend the money on a more efficient (eg 500W platinum) PSU rather than a less efficient 750W.

 

[NdMk2o1o]

Those EVGA power supply's r fantastic huh?
I was so surprised it handled my build with SLI 970 didn't even break a sweat, I guess I wasn't all that surprised because I knew the quality was top notch.
But then again I've been pretty lucky with power supplies, most recently I had a corsair CX 600 that ran beautifully for over five years , with a 2500 K overclocked 4.8 GHz 24/7

Best PSU I've owned including the early Corsair CX PSU's which were highly regarded even though they have gone downhill in recent years, won't be swapping this out in a long time if I can help it as I haven't had a dual GPU setup for years and don't think there are many PSU's out now with the same quality/cost as EVGA ..... I think I paid about £55 for this and it now retails at about £65-£70

 

[cdawall]

250W for a single gpu flagship seems to have held steady for a couple gens now(780ti on forward?) while the upper midrange on down seems to be going down...

Excluding the 290x/390x

 

[EarthDog]

Still 275W isn't going to change the story much at all. Also, Vega, we are all sure, will be a lot less than that. I expect them to be around 200W.

 

[cdawall]

Still 275W isn't going to change the story much at all. Also, Vega, we are all sure, will be a lot less than that. I expect them to be around 200W.

If it scales like the rx480 does I'm expecting 300w from them...

 

[EarthDog]

Perhaps an "*" for AMD systems...both CPU and GPU...

 

[eidairaman1]

One of the following but not limited to the following

Corsair
Seasonic
Evga
Nzxt
Thermaltake
Fsp
Or a like brand
Many companies have their bad products, but if you do even a cursory amount of research you'll find the proper units to purchase .

Personally I would go with 750 W or greater for the bill that you have listed

Enermax, Antec, XFX, SOME Rosewill models.

At the OP. Get what you can afford, but stay with in that list don't buy a low quality psu. The list jboydgolfer and I added to are a good starting point.

 

[Fx]

Personally, I would pick a gold rated 550-650w power supply found along the lines of either a EVGA G2 or Corsair HX and call it a day.

 

[cdawall]

Perhaps an "*" for AMD systems...both CPU and GPU...

That's what I was getting at lol

 

[Grings]

I would get a 650w just to be sure for future graphics card upgrades

While we have seen lower power use from nvidia cards recently, if amd bring out competitive cards again i think we'll see them selling power guzzling cards again

I think as soon as (or if ever) amd have a proper range of cards out again, nvidia will be using larger memory buses on the mainstream cards again

the titan is what would be selling at the 1080's price if amd had better competition, and with the step up to 384bit memory bus, its power consumption is not far off amd's stuff over 256bit, and power consumption even went up from maxwell to pascal

 

[SomeOne99h]

Look at my old PC:
Intel i7-860 TDP=95 W
GeForce GTX 260 TDP=182 W
PSU: OEM Delta Power supply 460W
95+182=277
Usage is 8 years approx

Modern Build:
Intel i7-6700K TDP=91 W
GeForce GTX 1070 TDP=150 W
Or
GeForce GTX 1080 TDP=180 W
91+150=241 OR 91+180=271

 

[EarthDog]

Look at my old PC:
Intel i7-860 TDP=95 W
GeForce GTX 260 TDP=182 W
PSU: OEM Delta Power supply 460W
95+182=277
Usage is 8 years approx

Modern Build:
Intel i7-6700K TDP=91 W
GeForce GTX 1070 TDP=150 W
Or
GeForce GTX 1080 TDP=180 W
91+150=241 OR 91+180=271

You do realize there was a gtx 270(225) and a gtx 280(250w), right? Wouldn't you compare those to the 1080 and 1070?? if you want to compare the right cards, you can match the 260 with the 1060 (120W) as they are both midrange. And also note, if you wanted to match performance, a new 1050ti would perform about the same as a 260 but in a 75W package.


Now crunch those numbers...

 

[SomeOne99h]

You assumed I am trying to match? I wanted to show that a powersupply with 460W can run even 1070/1080. Which is what the OP wanted. And to show how far you can push with a low wattage powersupply (assuming it is a good PSU).