How to calculate the Maximum Power Draw in KWH

[Djinni]

I'm looking to find a way to calculate the maximum power draw (assume CPU, RAM & GPU at full load) of my PC in Kilo Watt Hours. (To make it easier to work out roughly how much it's costing in electricity.)

Specs:
PSU: ThermalTake TR2 800W (80 PLUS Bronze Certified: with 82-88% efficiency @ 20-100% load under real world load conditions)
CPU: i7 2600k 4.5GHz (1.352v - 1.60v)
CPU Cooler: Thermaltake Frio (2 stock fans at speed: 100%)
RAM: 8GB G.Skill 1.5v DDR3
Mobo: ASUS P8Z68 V-PRO
GPU: MSI Twin Frozor II 560Ti (Core: 880MHz, Shader: 1760MHz, Memory: 2100MHz, Fanspeed: 100%) stock voltage
HDD: 2x Samsung Spinpoint F3 1TB (in RAID0)
Case: 5 stock fans (speed: 100%)
ODD: Standard LG DVD RW-DL
Display: LG Flattron IPS 236
USB: 1x Microsoft Sidewinder x6 (Keyboard), 1x R.A.T 7 (Mouse), 1x Tenda Wireless N, 1x Logitech Communications Headset


I also have a Ferguson TV connected we watch movies on... but we'd be paying for that regardless... (so only include if there is extra power draw when using the onboard HDMI out.)
(Yes... I have my LG screen connected to my GPU and the TV connected to the Mobo)


Sure I could go buy one of those handy plugs... but right now I need to be saving as much money as possible, not wasting it on gadgets.

[vesseblah]

FurMark test of whole system load with single GTX560ti is about 350, maybe 400-450W with overclocked i7.

If you assume 80% PSU efficiency, the computer draws about 500W from the wall under full load.

[Djinni]

That per hour? per minute? per second? what? 8-) (I'd assume hour... but nice to be sure...)

[Deleted]

500W means 500 joules pr second.

1W=1 joule pr second

500W is therefore (500x60x60)=1.800.000 joules pr hour.

Which is 1,8 kilowatthour, kWh.

[Djinni]

500W means 500 joules pr second.

1W=1 joule pr second

Why do I need to know about joules?
Current working:

[Deleted]

Why do I need to know about joules?
Current working:
<large pic>

You don't have to. I just find it easier to when doing the math. As i stated, it would be 1,8 kWh. I think

[Maharishi]

You don't have to. I just find it easier to when doing the math. As i stated, it would be 1,8 kWh. I think

Nah, your dimensional analysis is a bit off.

A 500w drain for 1 hour is .5 KWH of power.

Watts are a flow rate, KWH are a static measurement of total power.

Edit: to clarify, you were right, except that https://www.google.com/search?source...w=1600&bih=732

[Djinni]

A 500w drain for 1 hour is .5 KWH of power.

Watts are a flow rate, KWH are a static measurement of total power.

So the above image would be a correct working?

[Maharishi]

So the above image would be a correct working?

Looks good to me.

[Asera]

My 2500K @ 4600mhz with a 560Ti draws around 375W with F@H running on both GPU and CPU, according to my UPS.

My PSU is 80+ Silver though, not sure if that makes a whole hell of a lot of difference or not.

[Deleted]

Nah, your dimensional analysis is a bit off.

A 500w drain for 1 hour is .5 KWH of power.

Watts are a flow rate, KWH are a static measurement of total power.

Edit: to clarify, you were right, except that https://www.google.com/search?source...w=1600&bih=732

My bad

In return, a funny gif.

[vesseblah]

Sorry, my math was totally off in my first reply, but results more or less right.

Whole computer of course is whole computer including PSU, so it's around 400-450W with single GPU if you're doing folding or something like that, probably closer to 350W in gaming and 150W idle. Can count from those figures some weekly average. On top of that comes 100W from monitor when it's on, so the total of 500W is real while you're running some 3D intensive game.

[Deleted]

A 500w drain for 1 hour is .5 KWH of power.

Watts are a flow rate, KWH are a static measurement of total power.

Kelvinwatthenrys?

[Skelly]

I bought one of these http://www.thinkgeek.com/gadgets/travelpower/7657/. It's fun to go around the house seeing how much power everything uses.