Recommendation for PSU

[Randycool279]

Hey,

  I'm building a new rig for myself. It's gonna be on a Ryzen 7 2700x, MSI X470 Gaming Mobo, 16GB DDR4-3000, and a PowerColor Vega 64. I can't decide what psu wattage size to get. At the moment, I'm debating between an EVGA 750W Gold and an EVGA 850BQ. Will there be a huge difference if I go with a bronze psu rather than lower wattage but gold psu?

 

 

Thanks!

[hconverse02]

A small change is your power bill, maybe cents, but it's better to get a more efficient psu, and even with vega's insane power draw, you will have plenty with even 750w. If i may ask, why are you going with vega in this case? Prices have lowered so I see why you might get it, but just wondering.

[emosun]

Nothing in your system pulls 750w-850w

[TeunJrAarts]

you could also do the cooler master wattage calculator to get an idea of what everything needs all together.

http://www.coolermaster.com/power-supply-calculator/

[Randycool279]

7 minutes ago, hconverse02 said:

A small change is your power bill, maybe cents, but it's better to get a more efficient psu, and even with vega's insane power draw, you will have plenty with even 750w. If i may ask, why are you going with vega in this case? Prices have lowered so I see why you might get it, but just wondering.

Okay Thanks! I guess I'll go with the gold 750w psu then. I'm planning on buying this case Corsair Carbide . I'm going to be buying it from MicroCenter.

[.Apex.]

7 minutes ago, emosun said:

Nothing in your system pulls 750w-850w

actually it gets pretty close, Vega 64 is very power hungry, so i would recommend a 700 / 750W for that system.

[emosun]

5 minutes ago, syn2112 said:

actually it gets pretty close, Vega 64 is very power hungry, so i would recommend a 700 / 750W for that system.

with a theorethical max on the gpu at 350w and cpu at 104 watts and the rest of the components at a far over exaggerated 100watts that doesn't really make 750 or 850

[.Apex.]

2 minutes ago, emosun said:

with a theorethical max on the gpu at 350w and cpu at 104 watts and the rest of the components at a far over exaggerated 100watts that doesn't really make 750 or 850

the GPU pulls a typical wattage of 350W and the CPU pulls 150W on average, TDP doesn't mean watts.

 

all of those together and you get 500W for only the GPU and CPU, mix in all the other stuff and you get around 600W, and that's without overclocking, once you overclock you're easily gonna go over the 650W range, and i'm not even accounting for the peaks.

 

i would consider 650W power supply a minimum.

[emosun]

1 minute ago, syn2112 said:

i would consider 650W power supply a minimum.

k good for you

[seon123]

12 minutes ago, syn2112 said:

the GPU pulls a typical wattage of 350W and the CPU pulls 150W on average, TDP doesn't mean watts.

 

all of those together and you get 500W for only the GPU and CPU, mix in all the other stuff and you get around 600W, and that's without overclocking, once you overclock you're easily gonna go over the 650W range, and i'm not even accounting for the peaks.

 

i would consider 650W power supply a minimum.

Yeah.... No. 

Here's actual numbers for a Vega 64 and a 7820X system. This is the wall power draw with an AX760, so that's about 420W DC. 

Spoiler

https://www.anandtech.com/show/11717/the-amd-radeon-rx-vega-64-and-56-review/19

 

OP is not going to draw 180W more than that with their Ryzen system. 

[.Apex.]

4 minutes ago, seon123 said:

Here's actual numbers for a Vega 64 and a 7820X system. This is the wall power draw with an AX760, so that's about 420W DC. 

that's during a game man, where the vega 64 is loaded 100% and the CPU is loaded like what ? 30%? 

 

i'm talking about a full load here, that's how you pick a power supply, you don't pick a power supply based on a game load.

[seon123]

41 minutes ago, Randycool279 said:

Will there be a huge difference if I go with a bronze psu rather than lower wattage but gold psu?

Why are you even looking at 750W PSUs? Get a good 550-650W PSU, and you're good. There is more to a PSU than just the 80+ rating. The efficiency is among the least important aspects to a PSU. The electrical performance, noise and protections are much more important. Since it's a Vega, the Whisper M and Straight Power 11 are good options. Both have individual cables to each PCIe connector. Most other 550W PSUs have two connectors per cable. 

[seon123]

1 minute ago, syn2112 said:

that's during a game man, where the vega 64 is loaded 100% and the CPU is loaded like what ? 30%? 

 

i'm talking about a full load here, that's how you pick a power supply, you don't pick a power supply based on a game load.

You seriously think that Furmark and Prime95 simultaneously is a realistic load? 

You base it on a realistic load, and add some margin. Not the theoretical ms peak load. 

Even if you use a max load, that's about 325W for the GPU, and a bit over 100W for the CPU. The rest of the system draws a negligible amount of power. Add a bunch of margin for overclocking, and a good 550W is plenty. 

[.Apex.]

1 minute ago, seon123 said:

You seriously think that Furmark and Prime95 simultaneously is a realistic load? 

You base it on a realistic load, and add some margin. Not the theoretical ms peak load. 

Even if you use a max load, that's about 325W for the GPU, and a bit over 100W for the CPU. The rest of the system draws a negligible amount of power. Add a bunch of margin for overclocking, and a good 550W is plenty. 

based on that logic running a GTX 1070 and a 7820X on a 300W power supply should be sufficient.. 

 

i never mentioned furmark or prime95 to be a realistic load, but certain loads can peg your GPU and CPU at 100%, that's mostly for workstation stuff but are you saying he can't do any of those things ? it doesn't make any sense to recommend a power supply based on a gaming load.

 

also the 2700X draws 150W stock, don't know where you got that 100W figure.

 

[DocSwag]

52 minutes ago, Randycool279 said:

Okay Thanks! I guess I'll go with the gold 750w psu then. I'm planning on buying this case Corsair Carbide . I'm going to be buying it from MicroCenter.

You don't need that much wattage. What exact psu are you looking at?

 

You're better off getting a solid 650w psu.

[seon123]

6 minutes ago, syn2112 said:

based on that logic running a GTX 1070 and a 7820X on a 300W power supply should be sufficient..

 

i never mentioned furmark or prime95 to be a realistic load, but certain loads can peg your GPU and CPU at 100%, that's mostly for workstation stuff but are you saying he can't do any of those things ? it doesn't make any sense to recommend a power supply based on a gaming load.

 

also the 2700X draws 150W stock, don't know where you got that 100W figure.

 

If there was such a thing as a good 300W PSU, and the usecase was just gaming, yes. 

Which WS loads use both the CPU and GPU 100% at the same time?

 

Got the numbers from Tom's Hardware. 

Spoiler

https://www.tomshardware.com/reviews/amd-ryzen-7-2700x-review,5571-12.html

 

 

[.Apex.]

12 minutes ago, seon123 said:

If there was such a thing as a good 300W PSU, and the usecase was just gaming, yes. 

Which WS loads use both the CPU and GPU 100% at the same time?

Streaming + Gaming loads both CPU and GPU pretty hard.

Gaming + Multitasking, if he had dual monitors and he was doing other things while gaming, lots of people do those things, and depending on what they're doing it can get the CPU usage well into the 80's+

 

video rendering using GPU while doing other things

 

3D modeling and simulation ? video rendering using GPU while doing other things? Blender (using CPU + GPU to render)...  those are the things that i could think of, but im sure there's many more.

[Randycool279]

Would the power consumption be the same for a  XFX liquid cooled vega 64?

[brob]

1 hour ago, Randycool279 said:

Would the power consumption be the same for a  XFX liquid cooled vega 64?

Within 5W.

 

Evga has a number of 750W 80+ Gold psu, some much better than others.

 

A 750W psu would allow for some upgrading and overclocking.