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Start your day with a laugh: Your computer uses how much power?

post #1 of 100
Thread Starter 
Started up P95 and Furmark same time, this was the result:



1016W. (In the Unreal Tournament voice: "HOLE-Y SHIZA")

I think I figured out why Furmark would crash if I tried to OC my 680's at all. I thought it was impossible to use 1000W with a desktop. I was wrong. Guess I need a bigger power supply.
post #2 of 100
Quote:
Originally Posted by dr/owned View Post

Started up P95 and Furmark same time, this was the result:



1016W. (In the Unreal Tournament voice: "HOLE-Y SHIZA")

I think I figured out why Furmark would crash if I tried to OC my 680's at all. I thought it was impossible to use 1000W with a desktop. I was wrong. Guess I need a bigger power supply.

That's what your computer sucks from the wall. You need to multiply it with the efficiency percentage of you psu at that load and you get what your components actually use. So if your psu is 80% at 80% load and it pulls 1000w from the wall, your components actually use 800w and 200w gets lost as heat. So you still got 200w headroom if your psu was 80% efficient.
post #3 of 100
Question: Did you hook this up to the power strip with monitors included or did you just plug it into the desktop alone?
    
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post #4 of 100
Quote:
Originally Posted by Ribozyme View Post

That's what your computer sucks from the wall. You need to multiply it with the efficiency percentage of you psu at that load and you get what your components actually use. So if your psu is 80% at 80% load and it pulls 1000w from the wall, your components actually use 800w and 200w gets lost as heat. So you still got 200w headroom if your psu was 80% efficient.

^^This thumb.gif

OP you still got 20% headroom if your PSU was at its worst with efficiency.
Quote:
Originally Posted by Ajnin View Post

Question: Did you hook this up to the power strip with monitors included or did you just plug it into the desktop alone?

I too would like to know this as using an online PSU calculator i only made OP's rig out to be drawing about 680w but that was without GPU overclock, dont know how accurate the PSU calc is though redface.gif
Edited by superj1977 - 4/8/13 at 2:31am
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post #5 of 100
Thread Starter 
I definitely don't have anymore headroom if my desktop hard crashes under full load.

Yes this was a power strip. Yes I made sure to turn off the monitors after starting P95 and Furmark (they're the only other things on the strip).

It's the GPUs that are sucking all the power. CPU is in the 200-300W range. GPU's add +600W when full blast.

Going to re-run this experiment now. Hang on.
post #6 of 100
Thread Starter 
OK here's some more results:

(All results are taken with my monitors OFF, again, they're the only other significant thing on this power strip)

Idle:



Prime95 InPlace FFT (by itself):



Furmark (by itself)

post #7 of 100
Quote:
Originally Posted by dr/owned View Post

I definitely don't have anymore headroom if my desktop hard crashes under full load.

Yes this was a power strip. Yes I made sure to turn off the monitors after starting P95 and Furmark (they're the only other things on the strip).

It's the GPUs that are sucking all the power. CPU is in the 200-300W range. GPU's add +600W when full blast.

Going to re-run this experiment now. Hang on.

How are you calculating the power draw for your CPU and GPU?


EDIT: is your sig rig up to date?
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post #8 of 100
Wow just noticed you have a xfx platinum, I think those are pretty good units with superb efficiency especially at high loads. People are running 680 with a 400w psu. But this is ofcourse a full load of the gpu's and high overclock cpu. Try test it with one 680. I wouldn't upgrade your psu. Just don't run this full load tests anymore tongue.gif
post #9 of 100
Quote:
Originally Posted by dr/owned View Post

OK here's some more results:

(All results are taken with my monitors OFF, again, they're the only other significant thing on this power strip)

Idle:



Prime95 InPlace FFT (by itself):



Furmark (by itself)


Sick high idle usage! Do you leave on your pc a lot? Must hurt the wallet.
post #10 of 100
Thread Starter 
Quote:
Originally Posted by Ribozyme View Post

Wow just noticed you have a xfx platinum, I think those are pretty good units with superb efficiency especially at high loads. People are running 680 with a 400w psu. But this is ofcourse a full load of the gpu's and high overclock cpu. Try test it with one 680. I wouldn't upgrade your psu. Just don't run this full load tests anymore tongue.gif

The problem is that I'm moving to chilled water that will probably take my overclocks even higher :eek.

And yes I leave my desktop on 24/7. High idle is because I don't like stuff downclocking and the lag it brings when you wait for it to throttle up.
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