Hi all. Recently I started to get into Litecoin mining and I've been surprised at how well my gtx 780 does in my main rig with mining (520-550kh/s - which from what I've read is quite good for an Nvidia card). I've been using the newest version of cudaminer to achieve this. Now I've been thinking that seeing I have my lanbox which rarely gets used and it has my old GTX 580 SOC, I've thought about mining with that instead of stressing out my main rig all the time. Now if mining performance is proportionate to gaming performance, I'm thinking that the 580 SOC will get about 300kh/s at best if I mine with that. My question is, should I sell my GTX 580 SOC and buy an R9280x for $400AUD (+/- $20) and have that mining instead? I've read that a 280X achieves about 750-780kh/s. I'd probably get around $140-$180AUD selling my 580 SOC and I'm also selling my old GTX 570 which will probably fetch around $110-$125AUD (I won't post the link to my eBay listing because it's not allowed here afaik). note that retailers in Australia that sell AMD cards have not pushed their prices up like they have in the states - the price of 280Xs here used to be about $440 when they came out. Also my electricity is free.