Using HP Stream 7 Signature Edition purchased from MS Store.
It uses this CPU:
Intel® Atom™ Processor Z3735G (2M Cache, up to 1.83 GHz)
http://ark.intel.com/products/80275/Intel-Atom-Processor-Z3735G-2M-Cache-up-to-1_83-GHz
Comes with 1GB of RAM.

See attached screenshot of the store page I see on the Tablet.
Also attaching about page for the HP Stream 7 tablet.

The CPU is x64, that is the only requirement that is listed on the store page.