What Wolfie said!
The 8-bit part is for the display and same as I have on a Dell Notebook running the 64-bit version of Win10. The 64-bit/x64 part is for the CPU and the installed Operating System.
Wanted to add, we haven't had 8-bit PCs in more than 20-25 years, probably further back, my first in '92 was a 32-bit 80386/40MHz.