Yeah I'm kind of wondering the same thing. The 66.93 drivers have been the best of all the drivers they have released recently in my opinion and extremely stable so I wonder too if I should switch over to the 77.73 drivers.
Download the drivers. You can't tell what they will do on your computer by what they are doing on someone else,s. The drivers are stable but what you have on your system is what will determine whether there will be an issue or not.
If they don't work then just roll back to the old ones.
Ok guys i downloaded, installed the new drivers and then restarted my pc. Now i went into My C drive and found there were now 2 files one saying NVIDIA (it contains the 77.73 drivers) and NvidiaTemp (which contains the old drivers)...what do i do now? do i uninstall the old drivers?or just keep the folder the temp folder?