I was going to throw ESXI on an old R710 of mine but, zero of the Download Links work. I have even tried to grab the URL from the page source code. Still nothing. Does anyone have an active link to DL?
Maybe a temporary outage!? Don't know.
Anyway, you may want to download a Dell customized image from the Dell support page, e.g. http://www.dell.com/support/home/al/en/albsdt1/product-support/product/poweredge-r710/drivers?os=xi5...
Note that ESXi 6.5 is not officially supported on the R710.
André