從eizo的FAQ裡找到的算法
http://www.eizo.com/support/faqs/crt/index13.html

fV = fH / # of horizontal lines x 0.95

Example: A monitor with a horizontal scanning frequency of 96 kHz at a resolution of 1280 x 1024 would have the following refresh rate based on the calculation above.

fV = 96,000 / 1024 x 0.95

fV = 89.06
This figure is rounded down to produce a maximum refresh rate of 89Hz.


基本上大同小異.....