Power draw

Fri Oct 16, 2015 10:25 am

What is a realistic power draw when rendering in Octane on a 250 W TDP GPU ?

A guy from electric company just installed 15A limiter which allows 3.45 kW.

I am able to render on 19 GPUs at the same time while my wife cooked something on an electric heating board but using only one heating element.
We would like to figure out if we could make french fries on the second heating element at the same time without everything crashing down.

Fri Oct 16, 2015 12:19 pm

well obviously it's not 250W while rendering since that would be 4.7 kW with your 19 GPUs and you said you have 3.45kW limiter. Unless you have it split among three phases/more limiters (usually for domestic Electirc distributor (HEP) allows here is 4.x kW, 5.xkW , or tops 7.2kW they are allowing for single phase electric connection. If you have three phases then lowest is 6.6kW (3*2.2kW) and highest goes up to 21kW (3*7) for domestic usage, after that you need to buy/get "industrial" connection i.e. more expensive electricity bill

.

So in practice you cold use WattMeter in your electric socket which will tell you how much is the power draw when rendering or if you have UPS it probably has software to tell you that (my APC has all measures/logs up to 6 months back). My 780 6GB overclocked 200+ MHz don't use more than 205-215W in octane while rendering so i guess octane is not stressing it full (which is good).

Fri Oct 16, 2015 12:49 pm

I put everything I got on full blast, 19 GPUs, oven, top oven, iron, hair dryer and coffee machine and I couldn't crash the flat.
Then my wife told me the guys who came and installed the limiter looked like these two guys:

https://en.wikipedia.org/wiki/Pat_%26_Mat

it figures ...

Fri Oct 16, 2015 12:55 pm

BorisGoreta wrote:I put everything I got on full blast, 19 GPUs, oven, top oven, iron, hair dryer and coffee machine and I couldn't crash the flat.
Then my wife told me the guys who came and installed the limiter looked like these two guys:

https://en.wikipedia.org/wiki/Pat_%26_Mat

it figures ...

Then it's way more than 3.4kW or it's three phase so it's spread over all and no problem then.