Lower your OC a bit and see if it becomes more stable.
I have a hynix card that the memory will clock at 2200+ at 1500 strap, but isn't stable above ~1900. It would lock the system a few times a day until I figured it out.
It's unstable at 2050. At 2025 I've run it for over a week, but the error rate is high. I also might make some tweaks to the strap to see if it will reduce the error rate.