Anybody else having the same issue with me?

It has been numerous times lately that the pool reports to me that I'm not submitting anymore shares and when I tried to remotely connect to my rig I'm unable to (meaning the rig is freezing and needs a hard reboot). Checking the log the last entry would be somethign like Allocating DAG... or DAG xx% which isn't very helpful in determining what is going on wrong with the rig/miner.