I'm using the Claymore v12.4 options -mclock, mvddc & cvddc options to overclock and undervolt 2 x RX470s.

These changes are only taking effect on the first card but not the second which according to GPU-Z is behaving as stock.

I've tried multiple syntax (eg "-mclock 1255", "-mclock 1255,1255", "-mclock 1255, 1255" & even "-mclock 1255,1255,155".

Nothing seems to make the changes take effect on the 2nd card, although overall performance is slightly better with each card specified separately.

Any ideas?