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