Snapdragon 840 is better.
Snapdragon 680 is a 4G chip that only supports 4G networks, so in the current Chinese market, such a 4G chip has long since lost its living space, so mobile phone manufacturers will hardly use it in their own products. 840 adopts the enhanced Qualcomm Kryo 585 CPU core, and the super core frequency has reached 3.2GHz, as of 2021-01-27, which is the highest frequency existence under the A77 public architecture.
Snapdragon 840 OK, Snapdragon 680 is only an entry-level processor.
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Snapdragon 680 is Qualcomm's latest 4G standard version of the entry-level processor, which can provide users with good mobile phone 4G performance, while meeting the daily use needs of users.