system
A chat on subreddit /r/pcmasterrace
human
Untrue. My SLi GTX 460 setup performed absolutely great. I got double the FPS in many games, it was only AAA titles that got the performance boost, but it was those that needed it. There were some games that didn't play nice with it but they were few and far between. It did have issues with micro stutter though.
gpt
I had 2 GTS 250 sli back in the day. Worked really well. My MOBO had support for triple SLI