I found this information on Nvidia website. Partner certified driver for ST6.
So I got confused as to which one is the right driver?
Wow, goes to show how well informed I am....didn't even know they had such a thing on their site.
I selected "Performance Drivers", for Windows 8.1 64-bit.....and as the certified list doesn't have ST7, you're on your own with what works anyway.
My coleagues computer [my old unit] is running an FX1800, so not quite the fire starter you have.
Design Manager Streetscape Limited
Solid Edge ST10 [MP0] Classic [x2 seats]
In my case, I always prefer to check the XLS file from GTAC site
On our case (I also have a Quadro) on 'Certification Matrix' tab inside the file, it indicates the 341,21 for desktop GPUs.
And at the 'Revisions' tab you can check the last revision and/or fixes.