Yes, your electricity usage will rise a LOT when you start mining.
Oh allright! I see.
I happen to have two graphics card in this machine, becuase I have two different monitors and I couldn't get the monitor setup I wanted with just one card --- it seemed at the time.
Ok so, mining really increases resources then... Well mining at work should be good then, but it could get awkward if they decide to run a network wide scan to see what software is running and/or submitting network traffic....
What are you going to mine with? The cpu/gpu or a standalone miner connected to the pc? Either way your electricity use will increase.
Desktop PC which happens to have two graphics cards (nvidia decent spec). What do you think?
I can't measure the energy consumption from the actual PC, can I? You can measure the energy consumed by the PC using a kill-a-watt meter.
http://www.amazon.com/Arbor-Scientific-P4400-Kill-Meter/dp/B001JHGY2QIf you want to see what you are consuming while you mine, connect the tower to the kill-a-watt meter. Find your average kW/h, next multiple that by your utility cost. Mine is 10 cents per kW/h, that should give you a pretty good idea what it will cost to mine. FYI nVidia GPUs aren't as efficient as AMD.
I have one rig that consumes 1050 watts an hour, so that's 10.5 cents an hour or $2.52 a day.