Hello, I have a gaming computer that is currently running a single GTX 760, I am on a very tight upgrade budget and would like to know if it is worth buying a second 760 and putting it in SLI. Also, do all games support SLI, if not which ones don't? I am also worried because I have heard a lot of horror stories due to SLI (my PSU is 750W). So is it worth it and what games support it?