low physical/graphical(?) framerate slowing the game down a lot

[randomblaofdoom]

I've had KSP for a long time now, but ever since the very fancy new space centre my game has slowed down considerably - much more-so than can be attributed just to the graphical upgrade. I have played the game through steam on other, less powerful computers/laptops and performance there was very noticeably better. When running on default settings and 4-part ships I am already subjected to the orange timer. On lower settings, this starts occurring at roughly 10-part ships. The performance hit is slightly lower when looking at the sky, so I'm guessing it's partially related to the rendering of the surface and/or space station. Sadly, the performance hit has made the game not very fun to play at all. Any help would be greatly appreciated.

computer setup:

Phenom II X6 1090T

Radeon HD 6900 series

8gb RAM

windows 7 64bit

video drivers are currently the latest beta drivers for AMD. (updating them was the first thing I tried)

[sal_vager]

Hi randomblaofdoom, please see the support stickies and provide your game logs, settings and dxdiag