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I think bitmain (a large asic maker) only accepts bitcoin cash for their miners, or at least their latest version.

• makomk 9y ago
  Yeah, mainly for political reasons - they were one of the main supporters of Bitcoin Cash and it re-enabled the secret mining optimization they'd promised they weren't using, honest, which was accidentally broken by Segwit. At the time they started requiring it as the sole method of payment it was basically unusable with block times measured in hours, little in the way of exchange and other support, and I think the exchanges may still have required so many confirmations it took days to get funds onto them. They could get away with this because they had no real competitors. There were some rather unamused comments at the time from miners who got their first experience of Bitcoin Cash by having to use it to buy from Bitmain, questioning whether it was always this terrible given that all its very vocal boosters had been claiming it was the fast option compared to Bitcoin. (The usual response was to argue that the block speed varied between a minute per block and the hour+ one and they were just unlucky - which technically it did, it's just most of the time it was in slow mode and the brief fast intervals were days apart.)
• ric2b 9y ago
  This is correct. It's also important to note that bitmain is one of the main responsible parties for the creation of Bitcoin Cash and this move is mostly a way to boost it's value, because even though Bitcoin fees are high, they aren't that bad ($3 to $30 depending on the load) when you're selling devices for $2K+.