Coretec Group Inc (CRTG)

[rbairos]

You wouldn't multiply by 256 bits in that case, but by 8, I think you mean to say.
For 24-bit colour, you'd multiply by 3 bytes.
So total bandwidth for 24 bit color is: 1k x 1k x 1k x 60 x 3
= 180 gigabytes per second.

A lot!
But there's no reason would couldn't bring that down by orders of magnitude and still have a very commercially useful device.

ie:

512 x 512 x 512 x 10fps x 8bit color(256 grey levels)
= 1.25 gigabytes/sec

Cheers.