Not sure... I've never wanted to run it that slow for long enough to find out! heh. XMR algo kills the driver instantly even at stock :/

Yes Hynix does sick for over clock. A few are Micron that are mostly stable at 500.. so i just run them all at 400 . I am a very unlucky guy with pretty much everything i buy. I have only ever gotten one card with Samsung and even that cant go over 700.. or even stay at 700 reliably. heh