ASUS Motherboards Win 8 ready 64bit or 32bit?

I chose a ASUS motherboard with win 8 but I was wondering if it is 32 bit or 64 bit. If it is 64 bit it could save me almost a $100.

Motherboard

http://pcpartpicker.com/part/asus-motherboard-m5a99fxpror20

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131851&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

http://event.asus.com/mb/windows_8/

I chose a ASUS motherboard with win 8 but I was wondering if it is 32 bit or 64 bit. If it is 64 bit it could save me almost a $100.

Motherboard

http://pcpartpicker.com/part/asus-motherboard-m5a99fxpror20

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131851&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

http://event.asus.com/mb/windows_8/

HelpWithPC

Doesn't make a difference, also you can just keep it all in one thread.