Here watch this video on YouTube:
https://www.youtube.com/watch?v=lS9HQjIwrRMThat is tutorial
How to mod and flash your AMD GPUs' bios for mining, with those settings you will not need Overdriventool, as far as I know. Also there are other videos there that could help you in solving your problem.
But if you really want to stick with Overdriventool, maybe some settings are different on your other rig. So compare everything and see if there is difference between them.