Windows won't even boot up without freezing anymore this is the second time GGS made me have to reinstall windows. Original GG was way more stable
You can stop auto-start by holding a Shift key.
Also, I am pretty sure you read a warning about modded BIOS.
I would really like to help more, but there is only so much I can do with the limited information you gave me.
I do have modded bios on my RX 470s (1500 straps) is that the problem for all the freezing?
1500 straps could be a real stretch, depending on how high the memory clock is, so I wouldn't rule them out as a cause of instability.
By the way, you can pretty much achieve the same effect by copying only MC_SEQ_MISC1/3/8 from 1500 straps to the target straps and then applying nerdralph's strapmods (ACTRD=16, FAW=0, T32AW=0, TRRD=5). I have been scratching my head for the last few days in order to stabilize real-time memory timing mods and discovered a few new tricks here and there.