We use an external server for images and of course for all File contents (all linked to MEGA.NZ).
We are investigating with our provider's and hoster's technicians: it is not an excessive forum load but a (rather severe) routing malfunction.
Logins work with hiccups. Downloading, even from CPANEL, is veeeeeeeeery slow
I'm sure it's nothing like that, but given the graph above, I removed both the (useless) Facebook plugin and Google Fonts.
We are waiting for an intervention that will most likely move the forums we manage to a European Datacenter.