64-bit VIA CPU C7D nano?

I have a Biostar MB I bought from Amazon from what I can tell the model is P896AM48 -R02 VER 6.1
On the box the stickers says Viotech 3100+ and on the MB pcb also.
It's suppose to have a VIA C7D Nano CPU embedded. The owners manual says so.

I asked, in an email, to Biostar techsupport why I couldn't install an 64 bit Ubuntu OS?
Biostar tech support thinks it's an Intel Atom?

So do I have a 64 bit CPU? The owners manual has one line about 64 bit in the CPU section that it is 64 bit memory.
I read in my search for 64 bit C7D that it's only in the Nano version of the C7D.
 
What does the full description on the Biostar website say. Their inventories are pretty thorough.
 
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