If you want to implement or migrate your SAP system to a new HANA system then first thing you should do is checking the hardware certified situation , to do this , you can use the below updated SAP official web site.
You can select the appliance details from the left side of the page.
After that page will show you the available appliance like below example ;
Vendor : Hewlett Packard
CPU Architecture : Intel Haswell EP
Memory : 512 GB