Regadless of the RAM 4 or 8 GB the strap doesn't matter, its about the memory type not the size of the memory.
It's not good, cause hynix 4Gb is AJR memory, but 8Gb - MJR memory. Both types needs it's own straps.
Hmm.
Okay. So which would be appropriate for 8gb Hynix and 8gb Micron? (RX 570)