I have an ML403 board with EDK7.1i. When I try to connect with XMD to a ppc405 based design running at 300 MHz then the connexion does not seem to give the right information (when i read memory the data i get does not correspond at all to what i expected) although the connexion messages do not indicate any problem. Moreover when I download a bitstream containing the application (the very simple memory test for example in a system including DDR) the application keeps running and never stops. I do not have the same problem at 100 MHz speeds for the ppc405. Does anyone have an idea as to why I have such a behavior ?