Does anyone knows that can we still mine ethereum with E3 ?
A firmware update will supposedly address the DAG issue that was threatening to make the E3 obsolete.
My E3 with new firmware, still mines on F2Pool Asia (eth.f2pool.com:6688) (the servers for the US or Europe no longer work) . Other pools like MiningPoolHub still accept shares, but no longer credit any work (not sure why, but I suspect its the way the pools handle the DAG). The new firmware will stop working in early October for ETH. You can still mine other Etherium coins though.