I just noticed following feature with my GTX1080TI.
Without ETH pill:Mining software running with 1885MHz core clock.Everything OK.
With ETH pill: Mining software running with max. 1180 MHz core clock.
What might cause this?
How about the hashrate any improvement on hashrate? If the hashrate is increase well the core clock might be just little adjustment to set a straps to maximize the ram clock for mining ETH?
How about the version of your GPU driver? it sometimes because of the driver but to me it running fine with latest driver with increase of around 80% in hashrate.