SPI speed

I would like to know the maximum speed SPI clock rates in some main-boards-
Fez spider, Hydra, G400.
what are they?

there is a link to see it in User guide\schematic? in any spec?


I’m using 20000 kHz on G120 with ENC28 without any issues.
This is the maximum the ENC28 chip can handle.

We are looking into this.

@ Reinhard Ostermeier -

Look at the osc for sure. On EMX that is 18MHz. I think

What does EMX has to do with ENC28? It has built in Ethernet.