With an ETH-mining farm, can mine the same power of HASH as 0xBTC as it is an ERC20 token?
Are you asking how well it would work to turn a rig that currently mines Ethereum to one that mines 0xBTC?
Interesting question. A lot of Ethereum miners will need to switch to another algorithm when Ethereum 2 comes out.
In the 0xBitcoin project, we anticipate picking up at least some of that hash power.
If you have specific GPUs in mind, please tell me.