Dunno - can't remember the last time I saw any hardware that claimed to support 24-bit colour.
I'd probably make a gradient-filled square and write a little app to draw it in 16 and 32 bit color, and see what happens. You should notice a 'banding' effect in 16 bit which goes away in 32 bit.
I'd probably make a gradient-filled square and write a little app to draw it in 16 and 32 bit color, and see what happens. You should notice a 'banding' effect in 16 bit which goes away in 32 bit.