New
#11
I assume your new bios has the default settings? Here is a link to what I think is the manual for your board:
http://www.evga.com/support/manuals/...22-YW-E173.pdf
Search the pdf for 'CPU Feature'. A page on the CPU segment of the bios should appear. Is the 2nd core enabled? (see screen shot).
Edit: Heh! Ignore the dots leading to the third core...it's late. :)