I'm hoping someone hit this and can advise. Like title says:
- ubuntu 16.04, with a few 1070 and 1080ti
- had nvidia 390.48, cuda 9.1, all running fine for months (mainly ethminer 0.14)
- upgraded to nvidia 410.66
- without overclocking i get the expected performance
- as soon as i overclock either memory or gpu clock even by 1 mhz, hashrate drops to less than 10% of stock!
- installed cuda 10 ... made no difference (as expected)

Anyone?