I dont remember off-hand, but it was the last version of 18.x. In general, Ive seen no noticeable differences between windows driver versions since at least 18.6.1 for any algo (and Ive tried most) unless using an wolf0/xmr-stack (or clone) miner, which had an issue w/ >18.6.1
yes, thanks.
I disable non needed power states on Overdriventool beta and now able to run my vegas 64LC at ~1280/1100@800mv with 19.6khs. gpu-z power readings 105-115watt
I'm on win10 19.3.3 drivers
All my above posts are with p states 0-6 disabled.

I think new drivers can handle this p state transition better . I post once i get results.