You can run a 32bit OS on a 64bit processor, you just won't get the full benefits of the processor. But most people with 64bit processors don't use a 64bit version of the OS because driver support is patchy to say the least.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?