- Display interface (ie. Display circuits/DisplayPort) is too slow
- Graphics processor fill rate is too slow
To achieve 4k 10-bit color at 10,000 hz, we would need to drive pixels at:
3840 width x 2160 height x 10,000 hz = 82.944 ghz
At 10 bits color, it would be pushing 3840 width x 2160 height x 3 color components x 10 bits per color x 10,000 hz = 2,488.32 gigabits per second
To bring everything down to a more reasonable 100 mhz 30 output pins FPGA, we would get a pixel rate of:
(30 pins / 10 bits per color / 3 color components) x 100 mhz = 1 million pixels
Then we could drive 1 million pixels / 2160 height = 463 rows per FPGA, or about 5 FPGAs for the whole display.
Of course this isn't a general purpose display and would only be suitable for demos that fit in a FPGA. But imagine the ufo test at 10,000 hz. Or maybe we could fit an entire game in a FPGA?
Did I math right?