I posted a message on steinberg cubase regarding the GUI issue and got the following reply:
Try disabling Desktop Composition for Cubase. What this will do is turn off Aero when you're running Cubase and automatically turn back on once you close it. I don't run my TI on Windows 7 so I'm not sure if this will actually work. It could help since it would ease pressure off the graphics card.
1. Right-click on the Cubase icon on your desktop and choose Properties.
2. Click on the Compatibility tab.
3. Put a check next to "disable desktop composition".
4. Launch Cubase.
You'll get a message about Windows switching to a Basic theme, just close it. There's an option to "not show this message again" that you can enable if you want. But yeah, after doing this, see if you still have the GUI lag.
After you've done this the lag is MUCH less. Still a little laggy but for me it's acceptable.
Tnx 2 Hell Yeh
Tried it. Sadly no effect for me.
Thanks for the idea though.