I have been coding a more processor intensive game recently and it runs at a full 60fps on my 4 year old core2duo XP laptop.
However on my core2quad Win7 desktop which is only a year or so old it only runs at 50fps. DirectDraw and D3D.
Are there some speed issues with Win7 or newer versions of DirectX?
Would it be possible that the system is running at "entertainment mode" (http://www.adventuregamestudio.co.uk/yabb/index.php?topic=42635.msg566229#msg566229) or whatever?
This is a desktop so no battery settings to contend with.
Also other games run perfectly fine including AAA titles so it doesnt seem to be a pure performance issue but rather something ags related.