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.
http://global.sap.com/community/ebook/2014-09-02-hana-hardware/enEN/appliances.html
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