Interesting, CPU (1.27 of 16 cores) and storage look plausible, only the memory total is off. Since that widget sums up all 4 PBS, my guess is that one of them reports a bogus total and the others are fine. Can you check each PBS on its own in PDM and see which one shows the weird value? Also, is one of them running in an LXC container or somewhere without a fixed memory limit? Then the total might come from the cgroup and not from real RAM. Just a hunch. Open a report on bugzilla.proxmox.com. Mention which PBS version it is and what free -b shows on that box.