I have gathered a short list of things which helped me gain a solid 30-45 FPS boost on the battlemap and campaign map, i hope that some of you will have as much use of this, as i had.
Best of luck, Cain
1. Disable CrossFire, if you cannot find CrossFire in your Catalyst Control Center then it's because you ither do not have two cards in your computer, or, you like me own a card with two GPU's in it. If that is the case you need to disable Catalyst AI, i have tested with both "Disabled, Normal and Advanced" where the clear winner was Disabled, the reason being NPW is not yet optimized for CrossFire.
2. Checked to see if i had two sound drivers installed (which in my case, i had)
If you go into Device Management and then under Sound Devices, you should see one driver installed, if you like me have fx. Realtek and a ATI driver installed, then right click on the ATI Driver and disable it, the issue was mentioned on the AMD-ATI forums and the issue drains a lot of FPS because then sound plays in two layers, where one of them is silenced. This fix gave me a stable 20-30 FPS boost and the game is a lot more enjoyable.
3. The driver setup is important, i for one though have not been affected by any driver related issues on the graphics card, i have tried suggested versions such as 9.6 and 8.5 with neither of them giving me any increase to preformance, but some cards may be affected and i recommend that you try these drivers, i have heard several people saying this fixed their lag/shuttering issues. Personally i run on 10.2 drivers.
Hope the small guide can be of help to some ATI users with similar issues as i had, thanks to the Tech Moderators for their paticence to give me advice, i payed off big time!
EDIT: This thread has been stuck as it's essential for all ATI users looking for a crucial performance gain in the game - Prisca