Cartridge to console bandwidth

[McValdemar]

Hi everyone.
Reading on SEGA Retro about the cartridges, is reported:

https://segaretro.org/Mega_Drive_cartridges

"Cartridge ROM bandwidth: 10 MB/s (most cartridges), 15.200978–15.340906 MB/s (some cartridges)"

And I was curious to understand HOW some cartridges could have such higher bandwidth.
Anyone know?

[zborgerd]

See right above it:

Cartridge ROM chips: 16‑bit[5]

Most cartridges: MROM, 5 MHz, 200 ns cycles[6][7][8]
Some cartridges: MROM/EPROM, 7.670453 MHz (NTSC), 7.600489 MHz (PAL), 130–131 ns cycles[7][4][9]

[McValdemar]

You are right. The answer was sitting right in front of me.
Thanks anyway for helping noticing it!