How much graphics frame buffer memory is required to display one full screen?

Assuming that we have a display glass with a resolution of 320x240 and 16-bit color depth, how much frame buffer memory would be required to display one full screen?

Frame buffer size required in bytes = number of pixels × (color depth in bits / 8) = 320x240 × (16/8) = 153,600 bytes

Is a device advertised as having a frame buffer size of 256 KB big enough for a 480x272 display with 16-bit color depth?

Frame buffer size required in bytes = number of pixels × (color depth in bits / 8) = 480x272 × (16/8) = 261,120 bytes

The equivalent of 256 KB is 262,144 bytes. Since 262,144 is larger than 261,120, a 256 KB frame buffer is therefore large enough to support a 480x247 display with 16-bit color depth.

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