is my 850w supernova G2 enough

[jjohnthedon1]

hi guys, so i have a 850 watt psu in my system and everything is ok but i feel like i am cutting it awfully close right now,

r5 1600 at 4ghz 1.45 on the vcore

 

2 980tis at 1450 and voltage +50

 

2 ssds and 2 hdds 

 

6 fans

 

and a h110 cooler 

 

could someone help me please

 

 

[Oshino Shinobu]

Yep, it's more than enough. 

[iRileyx]

Easily

[jjohnthedon1]

2 minutes ago, Oshino Shinobu said:

Yep, it's more than enough. 

 

Just now, RKRiley said:

Easily

are you sure becasue dont the 980tis pull 250 each at stock never mind oced ? and the 1600 oced aparently pulls 233w which is kinda close since the psu is only gold ratted at 850 

does it not mean the psu can only handle 775 w ?

 

sorry im having trouble getting my head around it and a psu calculater said i need a 1200w psu lol

[PCGuy_5960]

5 minutes ago, jjohnthedon1 said:

r5 1600 at 4ghz 1.45 on the vcore

The PSU is more than enough. But you should lower your Vcore.... 1.45V is a bit too high for Ryzen

[jjohnthedon1]

Just now, PCGuy_5960 said:

The PSU is more than enough. But you should lower your Vcore.... 1.45V is a bit too high for Ryzen

right now im at 1.35 at 3.9/ xfr 4ghz to be on the safe side anyways 
could you look at my post just one abouve yoursa because i dont understand how it works please 

[DocSwag]

4 minutes ago, jjohnthedon1 said:

 

are you sure becasue dont the 980tis pull 250 each at stock never mind oced ? and the 1600 oced aparently pulls 233w which is kinda close since the psu is only gold ratted at 850 

does it not mean the psu can only handle 775 w ?

 

sorry im having trouble getting my head around it and a psu calculater said i need a 1200w psu lol

850w measures max power it can deliver to components, not max it can pull from the wall. It can actually deliver 850w and will, at max, probably pull around 925-950w from the wall.

[PCGuy_5960]

7 minutes ago, jjohnthedon1 said:

 

are you sure becasue dont the 980tis pull 250 each at stock never mind oced ? and the 1600 oced aparently pulls 233w which is kinda close since the psu is only gold ratted at 850 

does it not mean the psu can only handle 775 w ?

 

sorry im having trouble getting my head around it and a psu calculater said i need a 1200w psu lol

The PSU can deliver 850W. And if you want to know how much your rig actually needs, measure power draw from the wall while running a stress test(CPU and GPU). Since your PSU is 90% efficient, your PC needs only 90% of the measured power draw. I hope this helps 

[Oshino Shinobu]

5 minutes ago, jjohnthedon1 said:

 

are you sure becasue dont the 980tis pull 250 each at stock never mind oced ? and the 1600 oced aparently pulls 233w which is kinda close since the psu is only gold ratted at 850 

does it not mean the psu can only handle 775 w ?

 

sorry im having trouble getting my head around it and a psu calculater said i need a 1200w psu lol

PSU calculators massively overestimate the power that you need. 

 

The efficiency rating doesn't impact the amount of power it can provide, just the power it consumes. The PSU can output 850W continuously, though it will be drawing more than 850W from the wall due to losing a percentage of the power in heat. So if it's 80% efficient (just as an example) at 100% load, it will draw close to 1000W from the wall, losing 20% due to 80% efficiency resulting in 850W output. 

 

Also, bear in mind that those power draw figures are going to be when the system is pinned at 100% which doesn't happen often. Even under those circumstances, your PSU has enough wattage. 

[AnalogCanavity]

Yes that PSU can handle it, but you should of posted this is the PSU section 

[G27Racer_188]

You are about 250W away from cutting it close.

Your PSU is gold rated which means that it has efficiency of 87% minimum (closer to 90%). That means if it needs to supply 850W to the system, it will pull about 940W from the wall.

Anyway, your PSU is fine.

[jjohnthedon1]

Just now, Zic05 said:

Yes that PSU can handle it, but you should of posted this is the PSU section 

sorry i forgot about that =s

1 minute ago, Oshino Shinobu said:

PSU calculators massively overestimate the power that you need. 

 

The efficiency rating doesn't impact the amount of power it can provide, just the power it consumes. The PSU can output 850W continuously, though it will be drawing more than 850W from the wall due to losing a percentage of the power in heat. So if it's 80% efficient at 100% load, it will draw close to 1000W from the wall, losing 20% due to 80% efficiency resulting in 850W output. 

 

Also, bear in mind that those power draw figures are going to be when the system is pinned at 100% which doesn't happen often. Even under those circumstances, your PSU has enough wattage. 

 

1 minute ago, PCGuy_5960 said:

The PSU can deliver 850W. And if you want to know how much your rig actually needs, measure power draw from the wall while running a stress test. Since your PSU is 90% efficient, your PC needs only 90% of the measured power draw. I hope that helps

 

1 minute ago, DocSwag said:

850w measures max power it can deliver to components, not max it can pull from the wall. It can actually deliver 850w and will, at max, probably pull around 925-950w from the wall.

so could someone please tell me roughly how much my pc is up too say i was gaming both cards full load and cpu at a high load like in bf1 or something 

[jjohnthedon1]

1 minute ago, G27Racer_188 said:

You are about 250W away from cutting it close.

Your PSU is gold rated which means that it has efficiency of 87% minimum (closer to 90%). That means if it needs to supply 850W to the system, it will pull about 940W from the wall.

Anyway, your PSU is fine.

how do i add my system up if im 250 away from cutting it close ?

[Oshino Shinobu]

1 minute ago, jjohnthedon1 said:

sorry i forgot about that =s

 

 

so could someone please tell me roughly how much my pc is up too say i was gaming both cards full load and cpu at a high load like in bf1 or something 

You'd probably be around 700W under those conditions (would be higher from the wall)

[jjohnthedon1]

Just now, Oshino Shinobu said:

You'd probably be around 700W under those conditions

how do you come to that conclusion so i know how to work thies things out for my self please ?

[PCGuy_5960]

Just now, jjohnthedon1 said:

so could someone please tell me roughly how much my pc is up too say i was gaming both cards full load and cpu at a high load like in bf1 or something 

Measure power draw from the wall.  Your PSU has an efficiency of 90%, so only 90% of the power draw you measure is used by your PC.

[jjohnthedon1]

from what i can find on the net oc 980tis are pulling 320w each and the cpu at 233 so how can it only be using 700 ?

[Oshino Shinobu]

Just now, jjohnthedon1 said:

how do you come to that conclusion so i know how to work thies things out for my self please ?

Looking at the peak power draw when the components are under 100% load, then deducting some to account for the fact that games don't pin everything 100% so don't draw as much power. Around 230W for each GPU and 200W for the CPU + other bits and pieces from fans and drives would get to around 700W. 

[Oshino Shinobu]

1 minute ago, jjohnthedon1 said:

from what i can find on the net oc 980tis are pulling 320w each and the cpu at 233 so how can it only be using 700 ?

Under benchmark/synthetic loads maybe. There's basically no real world situation that will actually put that type of load on it. 

[jjohnthedon1]

1 minute ago, Oshino Shinobu said:

Looking at the peak power draw when the components are under 100% load, then deducting some to account for the fact that games don't pin everything 100% so don't draw as much power. Around 230W for each GPU and 200W for the CPU + other bits and pieces from fans and drives would get to around 700W. 

ok so even tho gpus are at 99 percent utilisation they dont draw that much power ?

[DocSwag]

3 minutes ago, jjohnthedon1 said:

sorry i forgot about that =s

 

 

so could someone please tell me roughly how much my pc is up too say i was gaming both cards full load and cpu at a high load like in bf1 or something 

Each 980 ti is probably around 300w overclocked. Judging by here at 3.9 ghz under load a 1600 pulls around 150-155w (need to subtract the 10-15w idle of 1080 from the 166w of 1600). I'd guess 4 ghz would be around 15w more, judging by here. Adding those together gives you about 770w or so. Ya should be fine.

[Oshino Shinobu]

Just now, jjohnthedon1 said:

ok so even tho gpus are at 99 percent load they dont draw that much power ?

Consider the fact that games are not maxing out memory or the core all the time like benchmarks/synthetic loads. Gaming loads are a lot easier on the hardware than synthetic loads, even if the load on the GPU is the same usage, the actual load is different. Synthetic loads are designed to push the card as far as possible while gaming loads do not. 

 

We can keep telling you it's fine and giving reasons, but you should test it yourself if you don't believe us. Get a wall monitor, plug the PC in and run some tests to see how much power it draws. 

[jjohnthedon1]

2 minutes ago, DocSwag said:

Each 980 ti is probably around 300w overclocked. Judging by here at 3.9 ghz under load a 1600 pulls around 150-155w (need to subtract the 10-15w idle of 1080 from the 166w of 1600). I'd guess 4 ghz would be around 15w more, judging by here. Adding those together gives you about 770w or so. Ya should be fine.

ok cheers, so it is kinda close with the other bits and bobs but should be ok ?

[Guest]

[G27Racer_188]

330W was probably total system power consumption, not just the GPU.

My estimates:

GPUs = 220 x 2 = 440W

CPU  ~ 130

and 70-80W for motherboard, drives and fans.

Totals to  650 W.

Your system will very rarely use this much power.