Video memory

From 68kMLA Wiki

Video memory, or VRAM, is the memory allocated for, or used by, the video system. Some Macs have dedicated VRAM; others sacrifice some system memory to be used for video.

The following table documents how much memory is required just to contain the screen buffer. On modern video cards equipped with a GPU, additional memory would be required for video processing.

Color depth → ↓ Resolution	1-bit	4-bit	8-bit	16-bit	24-bit
320×240	76800 9.4 KiB[1]
336×240	80640 9.8 KiB
480×320	153600 18.8 KiB	614400 75 KiB
512×342	175104 21 KiB[2]	700416 86 KiB	1400832 171 KiB[3]	2801664 342 KiB
512×384	196608 24 KiB	786432 96 KiB	1572864 192 KiB	3145728 384 KiB
640×400	256000 31 KiB[4]	125 KiB	250 KiB
720×364	262080 32 KiB[5]
640×480	307200 38 KiB	150 KiB[6]	300 KiB[7][8]	600 KiB[9]	1.2 MiB
800×600	480000 59 KiB	234 KiB			1.8 KiB
832×624	519168 63 KiB	2076672 254 KiB	4153344 507 KiB	8306688 1 MiB	16613376 2 MiB
640×870	556800 68 KiB	2227200 272 KiB	4454400 544 KiB[10]
1024×768	786432 96 KiB	3145728 384 KiB	6291456 768 KiB	12582912 1.5 MiB	25165824 3 MiB

Notes