Hi,

I'm not trying to be a troll, but why would you want to mine with a GTX295?

Accoring to https://en.bitcoin.it/wiki/Mining_hardware_comparison you could get about 100 MH/s using 289W.  For about $20 you can buy a Asicminer USB block erupter that only uses 2.5W and mines at >300MH/s - check out ebay!

Cheers,
o999.