use this app to check GPU & driver status...... GPUZ
in regards to the ''best'' driver, there's really no answer other than just use the latest one 186.21, if your rig dont play nice with them just work your way backwards through driver revisions until it does......
i've been using vista x64 driver (btw im using gigabyte 8800GT)
174.74 beta forceware on my win 7. So far the most stable driver
i've used (no game crash/freeze etc)
My Computer
At a glance
Windows 7 Ultimate x64Intel Core 2 Duo E4700 2.66GhzKingston Value RAM KVR667 DDR2 4GBGigabyte GeForce 8800GT NX88T512HP