My S3 is running virtually silent now. l replaced the stock fan at the front (the end with the network connector) with a Corsair SP120 fan blowing in and removed the rear fan entirely. The fan is running at 1920 rpm with 48/48 temps, ambient is 23C.. S3 is overclocked to 225. Maybe won't work so good in hotter countries but here in Uk with summer over should be okay for the next 6 months
I see 48/48 as way to high as mine sitting out in the open run 40/38 with stock fans
These are in a 26.3C ambient room, apart from the highlighted one which is in my bedroom at 23.5c ambient, S3+ stock clocks/fans etc