omyssz8fi2ep The name of the driver isn't a problem, and in fact the game doesn't care at all. The only details that matter are the vendor and device IDs, which tell the game what GPU you have and therefore how to rate it.
Please repair Sims 3 if you haven't already, so you're working with the default .sgr files. Open GraphicsCards.sgr, in one of these locations (depending on the type of install) by default:
C:\Program Files\EA Games\The Sims 3\Game\Bin
C:\Program Files (x86)\Steam\steamapps\common\The Sims 3\Game\Bin
Right at the top, in the second line, change the device ID from 0x6798 to 0x15bf , but don't touch anything else. This will trick the game into thinking you have an HD 7900-series GPU. We can add your actual device name if you want, and feel free to ask if you'd like, but this quick and dirty method works equally well.
As a side note, the white screen when loading a save, after editing the .sgr files, is often the result of a deleted or incorrect punctuation mark. I got that once when I deleted the second " and typed in my own, not realizing that mine was slanted instead of straight. If you do delete something, it's best to copy the same thing from another line of the file to make sure you're getting the right character.
