Basically I can't seem to use the maximised client without it becoming very laggy. I have a Geforce GT650M and it packs quite a punch. On the exe used to launch RS there is in the right-click menu an option to execute with the dedicated GPU or the integrated graphics (being Intel HD). There is no such option for a .jar file. Any ideas? Note this is not really a bug, but it wouldn't let me select 'no prefix' when I tried to post the thread.