I haven't mined anything since BTC was around $20, and all these new coins and miners have me very lost.
I currently have a GTX 580 lightning in a 2500K rig with Seasonic X760, and a GTX 660 Sig2 in a 2600K rig with Seasonic X650 (ITX build).
I have a set electric bill, so I wont have to pay anything to mine, however, I have weak electrical wiring in my house (AC + Vacuum on same breaker = Power outage to half the house).
First off, with cudaminer what could my current cards pull, and secondly, would it be worth swapping them for 750TIs? The 660 was open box from newegg, so I can return that and get a 750TI for the same price essentially, and the 580 I could offload on ebay for ~$170. I don't play too many AAA games, just Source games and Rust. So Id be fine with the graphical power as well. I could probably justify picking up an extra card or two after that as well. Could fit three in the 2500K rig without risers (Z68 Pro Gen3).
Probably OT for this thread, but I could also mine the CPUs. That would be primecoin I believe. Would I be able to mine both at the same time?
Also, both PCs see regular daily use. I want to be able to keep browsing / twitch streaming (console games through capture card) on my main, and watching BRs and compressing movies on my HTPC without interruption.