Upgrade Exsi 5.5 to 6.5 or 6.7

Hello Guys,

I write because I have a question to perform the ESXI update

I have ESXi 5.5 and I would like to make this update. I have seen the documentation and video on youtube, the offline process seems to be simple to do, but this raises some doubts for me.

1) where can I download ISO 6.5 or 6.7

2) my hardware will be compatible, I have a dell R320

I hope you can help me with these questions, Thank you.