AMD 64 and 4.10. will they work?

[Ara Avvali]

I have checked on site and what I can see that 5 is the one which actually
supports athlon 64 processors. But what I am wondering if there is anyway to
run it under 4.10 since we are looking for stable series. I mean is it
possible to run 4.10 under AMD64 and if it is, do I get benefit from speed
improvements over 32 bit processors or the only way to get a true 64bit is 5
series

Thank you for help