I tried to change my timing by copying and pasting the 1500 in to the 1625 1750 2000. I followed instructions perfectly using https://www.youtube.com/watch?v=OP_zSP2H6ho. After flashing, I get this message "No AMD graphics driver is installed, or the AMD driver is not functioning properly. Please install the AMD driver appropriate for your AMD hardware." I had to flash my old bios settings to get it working again.
I'm quite new to mining, but isn't it a huge No-no to put anything than stock to 1625?No one ever mines at that frequency, so it should always have a safe stock timings, so card can work after PC restart.