Tip T327 - While 24-bit or 32-bit colour modes provide the best palettes for graphic use and modern games and multimedia programs, most video cards are much slower in 32-bit than in 16-bit. Also more memory and resources is consumed for storing screen bitmaps and textures.
Fix: Consider switching to 16-bit mode. In most cases, the quality is just as good.
For more information, please see the (FAQ).