it seems to me not so much profitable.
Zcash 24 our 380 h/s = $15.45
ETH 24 our 350 mh/s = $26.39
ETHC 24 our 350 mh/s = $24.03
if for cards 470 480 380x 390x do not get to 100 h / s to not see well card

Your equihash rate is way too low. If done right it should be double of what ethash rates are.
That is about right. For my AMD R9 390, it can do 30MH/s. For the ZEC, it can do 60 slol/s or 30H/s. 1H/s = 2 Sol/s.
60 on a r9 390 (not x ?) mine does 56-57 what clock you run at?
in total i do 410mh on ether and 860 on zcash (r9 270 has very good speed, close to 380's)
I had 58-60 sols/s for 390 nonx, the frequency is 1120/1250. The memory frequency does not need to be too high.
hum ok ,but mine cannot run above 1090/1525 for 1100 i have to use +13mv, you decrease memory? i though it speed high memory speed
with msi afterburner i cannot under clock
i m running now 1090/1525 for 59mh
for r9 380 i keep stock speed, overclock very bad and make mostly no difference