If you have Xid 61 troubles, you might check out this thread:
There are quite a few people here with the (maybe) same problem and it goes back a few months.
After much experimentation a user found out that the problem happens when the card goes into a low power state that switches down to PCIE Gen 1, and if the card tries to go up to PCIE Gen 2 or 3 afterwards sometimes the dreaded Xid 61 is encountered.
The temporary fix found was to limit the frequencies of the card to avoid to ever go down to PCIE 1:
sudo nvidia-smi -lgc 600,2130
Please not that those values are for my RTX 2070 Super, depending on your card yours may vary. First is minimum freq, second is maximum allowed.
It worked great for me and a few others (so far), but some people may still experience issues. No official fix from nvidia for the meantime.
Here is a command to check your current values:
nvidia-smi --query-gpu=timestamp,name,pci.bus_id,driver_version,pstate,pcie.link.gen.current,temperature.gpu,clocks.gr,clocks.mem,power.draw --format=csv -l 60
Hope that helps, artyom.
[edited for typos]