I know its almost a month Old, But I had the same problem with a Nvidia graphics card on my laptop, you have to play around with the Anisotropic, antialiasing, and texture filtering. For your flickering try forcing vertical sync on or off, strangely enough I had worse flickering with 312WHQL drivers WITH Vsync.
If none of that fixes it, try updating to beta drivers (I am currently using those on a Geforce GT 650M and it works great (im also using a GTX 260 and it works well also.)
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