Graphics Flicker / Artifacts after patch 2.3

[Baneus]

Currently using a brand new GTX750ti which replaced my old ATI 6870

Current issues:
Object flicker - seems to occur on objects that are rendered in unreachable locations. The trees surrounding The Goblet are one that stand out. This happens all the time.
Full screen flicker - this is almost a strobe effect. All menus lose their backgrounds and get replaced with an alpha chequered mesh. Japanese writing appears randomly, overlaid on the English UI components (mostly in the chat boxes). This happens occasionally, I fix it by alt-tabbing out of the game and then back in.

I run the game at max graphics with everything turned on at the highest setting in full screen mode.

[Squa11_Leonhart]

Object flicker - seems to occur on objects that are rendered in unreachable locations. The trees surrounding The Goblet are one that stand out. This happens all the time.
Full screen flicker - this is almost a strobe effect. All menus lose their backgrounds and get replaced with an alpha chequered mesh. Japanese writing appears randomly, overlaid on the English UI components (mostly in the chat boxes). This happens occasionally, I fix it by alt-tabbing out of the game and then back in.

I run the game at max graphics with everything turned on at the highest setting in full screen mode.

Also a sign of faulty video memory.

At the very least, try a driver update.