Hey! I also own a 5700 and i flashed a XT bios on it and copied 1500 straps to 2000.
I'm getting 57.3 Mhs out of it, but I saw your post. You said you changed "tRef (that gave me +1MH for ETH)". Where can I find this value in BIOS?
Can you help me? I dont use AMD MEm Tweak XL since I use HiveOS and I need to change that value in the BIOS itself.