Both the maximum resolution and the performance depend on how many bits it processes at once (32, 64 or 128 bits) and how much memory is on the video adapter (2, 4, 8, 16 or even 32 MB and up).
|Number of colors||16||256||65,536||16.7 million|
|Bytes per pixel||.5||1||2||3|
|640x480 (VGA)||153 KBytes||307 KBytes||614 KBytes||921 KBytes|
|800x600||240 KBytes||480 KBytes||960 KBytes||1.4 MBytes|
|1024x768||393 KBytes||786 KBytes||1.5 MBytes||2.3 MBytes|
|1280x1024||655 KBytes||1.3 MBytes||2.6 MBytes||3.9 MBytes|
|1600x1200||960 KBytes||1.9 MBytes||3.8 MBytes||5.7 MBytes|
Note also that adjusting hardware acceleration to less than its full setting can reduce the amount of video memory available.