[fernandovg]

But what about this:

pll_freq = floor(2400 / (2 * core_freq)) * (2 * core_freq)
gpu_freq = pll_freq / [even number]

http://elinux.org/RPiconfig

pll=freq = floor(2400 / (2 * 610)) * (2 * 610) = 2440
gpu_freq = pll_freq / [even number] = 2440 / 4 = 610

Mine is 500. The math shows as 610.