These are the macmini kexts with a modified ATY_init to work with the 5750 HD, all credits goes to imkantus.
You'll have to use both of your DVI outputs to get any signal though.
Read this carefully: http://netkas.org/?p=465
Its a 32 bits BETA version.
This is a Galaxy build. You dont need to add your device id with this kext.
Credits by Galaxy.
ATI- QE_CI exotic cards patch for 10.6.4
Due to me having not enough time and Apple/amd removing r600
(hd2900) support from kext it took longer than usualy.
..
EVOenabler modified for X1700
ATISupport, ATIRadeonX1000 made for Device ID 71D5
ATINDRV from 10.5.8
EVOenabler can be placed in /Extra/Extension
The other files MUST be placed with "rights" in ..