This model that you specified AWRDACPI, is not the correct model of the motherboard. It could also be a components/module found on other non-intel motherboards or it could also be an OEM based motherboard.
I would suggest you to check for the correct model of your motherboard and contact the manufacturer to get the information you require. This specific component/chipset or module can be found on different manufacturers motherboard such as nvidia, gigabyte. foxconn and others. It would be better to check for the correct model as without a specific model we cannot guide you to the correct drivers or hardware support for this model.
FYI: this AWRDACPI may be found on some quite older motherboards and I would assume the max memory will be between 2GB and 4GB, but I don't know yet if you will find even the beta Windows 7 drivers as none have been validated yet and even on these older board, it will take even longer for the windows 7 drivers to be validated and become available.
Hope this will be useful.