You say your computer is always on any way but I would make sure you're not running at a loss ($/electricity wise) before continuing to mine.
Thx. Already did that. As I use the rig for gaming and work anyways I just took the extra electricity needed for mining rather than being in standby (as far as the GPUs go) and that is fine taking the current BTC - exchange rate. As I said: Provided the BTC value is above ~100 at the time I put the mined BTC to use I am making a profit from mining.