Make sure you delete your bin files. If not it will use the old ones and not create new ones with the new driver.
deleted
3375MHs
with
-g 2 -w 64 -I 13 --lookup-gap 2 --thread-concurrency 8191 --gpu-memclock 1500 --gpu-engine 1080 --temp-target 70 --temp-overheat 80 --temp-cutoff 82 --gpu-powertune -15 --gpu-fan auto --failover-only --expiry 20 --scan-time 10 --queue 0 --no-submit-stale