Sudden low hashrate with older AMD GPU

So I've been mining in a pool (various) using nanominer on Win10. I have 2 AMD R7 360 4gig cards.

I have consistently been getting 1.5-2 MH/s on each card for about a month.

I restarted my PC yesterday and now I only get 60-70 kH/s!!! I tried different miners and all different pools. Any ideas?

I tried removing all drivers and installing all different versions with no luck.