Hi all,
So AMD just released new Driver:AMD Radeon Adrenalin Edition 18.12.2 drivers.
Among many new stuff- there is now an option to change Memory timing :Automatic/Level 1/Level 2 - and they apply on the fly when you choose "Apply", not even a restart is requierd!.
I did small test with oclmembench on my RX 470 4GB Hynix on Stock Bios 1206MHz/1750Mhz.
Timings -Automatic: 165 GB/s
Timings -Level 1:     169 GB/s
Timings -Level 2:     182 GB/s

Level 2  @ 2000MHz Mem OC: 195~200 GB/s

Have you tried it and compared results? I think it's nice by AMD to provide this option- what do you think?