for cs:s alot of things come into play like which server you play on and your ping. Also it is specifically made for ATI, you might want to experiment with your drivers.
85C is pretty fine, with overclocking thouhgt it can GO OVER 100 , thats why I dont really recommend it. But if you look the core threshold temp is 130 so that should say something. The 5700 can currently handle an game so there really...
The Acer 1712 is in a larger group called the 1710 (look at the top left hand corner of the lappy). As you all know there is still the Acer 1714 (which the only diffrence is the 3.4GHZ cpu) so Acer might just get parts from that and if...
$Circle$ go and check out http://www.laptopvideo2go.com/ for good laptop drivers. I currently use the 5.6.6.3. and have had no problems with any games.