So what happens when you copy the 1500/1700 straps on a GTX1070, will it go over 30 MH/s?

This isn't even the issue though. It would already be done if understanding the binary was all it took.

Sadly it is encrypted, it will not flash a bios which hasn't been properly signed with a public/private key concept. This means that to understand it you first have to decrypt it, modify it, and then have the key to be able to re-encrypt it correctly.

Nothing new, we've got a bypass for an official (signed) rom. They can be flashed with NVFLASH. Many have been cross-flashing other vendor BIOS' since about a month after launch.. It's the inability to (easily) edit the BIOS values and more importantly since the values would be modified the original checksum breaks and the herc cert is no longer valid.. We cannot bypass that check... there is where MOD BIOS' for Pascal died a quick death.