2D flickering of GeForce FX 5900 – a bug or lame PCB design?

Andrew Vorobyew (anvakams), our video section editor, answering these forum questions related to screen flickering of NVIDIA GeForce FX 5900-based cards, informed that it seemed the reason of 2D flickering during scrolling of large and picture-rich texts was the 2D clock speed not reduced but set to the 3D nominal. The same flickering occurs in a number of menus or intermediate screens between tests (i.e. in 3DMark03).

This problem was examined on 4 different graphics cards with different drivers. FX5800 doesn´t produce such artefacts, but one of the old 5900 Ultra cards on different PCB caused the flickering as well.

Andrew believes the flickering is caused by a hardware GPU bug or PCB circuitry (repeated in the new design) that produces crosstalk and/or raises 2D clock.

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