witch version do you all use for mining with AMD cards?

i'm useing ethminer-0.9.41-genoil-1.0.4b3 atm. i got a little bit more on it then with eth_pp_ua-openclminer

anyone know why a 390 does the same hash as a 390x ?
i'm useing Non-WHQL-64Bit-Radeon-Software-Crimson-16.2-Win10-Win8.1-Win7-Feb23
i tried with Non-WHQL-64Bit-Radeon-Software-Crimson-16.3-Win10-Win8.1-Win7-March9
but i slows the mining down to 20MHs tried 15.7.1 to was same as 16.2

anyone tried with AMD-Vulkan-Radeon-Software-Beta-Feb25 ?