Video memory

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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

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