Will 650W be enough? Let me know what you think.

[JPStone]

Looking to use a 650W 80+ Gold EVGA PSU I already have for this build. Will it be enough? Not gonna do any insane overclocking but PBO will be on and I know from experience the CPU will pull around 150W at load with PBO enabled at board max settings. Not sure about the GPU (PNY Geforce GTX 1070 XLR8 OC2). l am thinking 650W would be enough with a little headroom for efficiency but thought I would get a second opinion or two. Thanks guys let me know what  you think. 

 

Ryzen 7 2700X

16 GB GSkill Trident Z RGB CL16 3200 MHz

Open Loop CPU cooler w/ D5 PWM pump

GTX 1070 W/ Dual Fan cooler

3 120mm Case Fans

3 140mm Case Fans

1TB SSD

Maybe one 16" RGB Strip

 

 

[Guest]

More than enough power.

 

Out of curiosity:  WHICH EVGA Gold?  There's only about a dozen different models. 

[JPStone]

Just now, jonnyGURU said:

More than enough power.

 

Out of curiosity:  WHICH EVGA Gold?  There's only about a dozen different models. 

EVGA 650 GQ 80+ Gold

[GabeThePCHelper]

Just now, JPStone said:

EVGA 650 GQ 80+ Gold

That would be more than enough, especially that 80+ gold rating.

[Eastman51]

it'll be fine. I have a 750W on my system and its completely overkill (by like 200W, probably more since I haven't actually measured power draw and pcpartpicker says 384W for my PC). 

[bowrilla]

 

3 minutes ago, JPStone said:

l am thinking 650W would be enough with a little headroom for efficiency but thought I would get a second opinion or two.

Little headroom? A 450W PSU would probably still be sufficient with a bit of headroom. A 2700(X) in torture mode will maybe breach the 140-150W barrier but definitely not in regular use cases even with OC. A 1070 stays safely below 200W afaik. Pump, fans and the mechanical drive won't draw much power either. I've paired an overclocked 2700 with 32GB of memory a 1080Ti, several fans, 2 SATA drives, an M.2 drive and a pump (and some USB stuff) off a SF600 and it never ran into any troubles, the PSU stays pretty quiet.

[Eastman51]

1 minute ago, bowrilla said:

A 1070 stays safely below 200W afaik.

According to GPU-z, my 2080 only pulls max 80W.

so, uh, idk if a 1070 would actually pull that much power.

[JPStone]

1 minute ago, Eastman51 said:

According to GPU-z, my 2080 only pulls max 80W.

so, uh, idk if a 1070 would actually pull that much power.

Id think yes or roughly the same amount of power anyway only because Turning cards are more power efficient than the Pascal ones. My 1080 I have in my current rig pulls around 108W-110W at 100% Load

[Eastman51]

3 minutes ago, JPStone said:

Id think yes or roughly the same amount of power anyway only because Turning cards are more power efficient than the Pascal ones. My 1080 I have in my current rig pulls around 108W-110W at 100% Load

That would make sense.

My 2080 would be mildly more power efficient, which would line up to be near 10-20W lower at 100% load.

[bowrilla]

11 minutes ago, Eastman51 said:

According to GPU-z, my 2080 only pulls max 80W.

so, uh, idk if a 1070 would actually pull that much power.

NVIDIA specs list a max GPU power draw of 150W. That's the technical limit for a oc'ed 1070 unless you do a shunt mod. 

 

Edit: corrected an error.

[Eastman51]

1 minute ago, bowrilla said:

NVIDIA specs list a max GPU power draw of 150W. That's the technical limit for a 1070 without OC unless you do a shunt mod. 

Interesting.

idk if I could get around to it any time soon, but I could put my 1070 in one of my PCs and see what GPU-z reports for power draw.

But ofc that's technical limit, so it may never reach that much for me.

[JPStone]

3 minutes ago, bowrilla said:

NVIDIA specs list a max GPU power draw of 150W. That's the technical limit for a 1070 without OC unless you do a shunt mod. 

Thanks. Yea not gonna be shunt modding it can not afford to risk frying it at least until I can afford an upgrade then maybe ill see how far I can push a 1070 before it burst into flames or spews out "Blue Smoke"

[bowrilla]

Oh, and I think the 2700(x) have a software limit set in BIOS for their current draw. If you lift this you can go beyond 140W or so I think. But even with an overclock, in Prime95 I could never get my 2700 to draw more than 160W and have a stable oc. That's torture.

[bowrilla]

1 minute ago, Eastman51 said:

Interesting.

idk if I could get around to it any time soon, but I could put my 1070 in one of my PCs and see what GPU-z reports for power draw.

But ofc that's technical limit, so it may never reach that much for me.

I'm pretty sure the software will only read the PCIe slot power draw. If the GPU doesn't list its own combined power draw that number is pretty useless.

[Eastman51]

26 minutes ago, JPStone said:

Not gonna do any insane overclocking but PBO will be on and I know from experience the CPU will pull around 150W at load with PBO enabled at board max settings.

As an fyi,

In my experience, PBO doesn't do anything substantial. I run cinebench r15 with PBO off and with PBO on (Ryzen 5 2600x), and got scores within 5 points of each other. I have a NH-D15, so I wasn't lacking in cooling power.

 

[seon123]

3 hours ago, GabeThePCHelper said:

That would be more than enough, especially that 80+ gold rating.

What does the 80+ rating have to do with anything?

[bowrilla]

17 hours ago, seon123 said:

What does the 80+ rating have to do with anything?

For this question: nothing at all.