Unity 4 editor run really slow

hi, i got a good computer, win 7 64 bit, processor i7-3820, graphic card gtx 560ti, 8gb ram but unity runs slow as hell. Even when i create a new project, i just create a terrain and then when i move the camera around its laggy, if i open the asset store it takes about 5 minutes. I tried running it in compatibility mode or administrator same thing. Anyone knows how i can fix that. thanks

Fixed, i downloaded the new beta driver for my graphic card and now everything is smooth

I’ve never ran into this issue, but I’ve seen some old threads about this;
Remember that Unity Editor is GPU accelerated and if drivers are broken it won’t run fast enough.

well I know this is quite old… but I’m having the same issue , and my drivers are all new… unity 3.x.x used to work perfectly but unity4 runs at about 5 fps in the editor…
horrible…
anyone know fix for this?