Hello Everyone   
first post!!

i am running 2 rigs, all cards are RX 580 8g armors, Windows 10 with claymore v15, both rigs stopped working when the ETC epoch hit #379
All GPU's  "not enough GPU memory to place DAG, you cannot mine this coin with this GPU"
"OpenCL error -61 - cannot allocate big buffer for DAG"
"OpenCl error -38 - cannot write buffer for DAG"
server: accept failed with error: 10004

my virtual mem is at 55000
AMD Drivers 19.9.2
im using AMD software for tuning GPU's "GPU 1165MHz, 853mV" "Memory 2080MHz, 853mV"

Now when i update drivers to either latest 20.9.2 or drivers back to near beginning of the year i can mine again but now the hashrate is 19.2
Without tuning gpus i get 22.4 hash

Before #379 my hashrate was 31.3

In my bat file i have "-eres 0 -epsw x -mode 1 -r 1 -strap 1 -rxboost 1"

looking forward to solution
thanks