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    Author Topic: Claymore's ZCash/BTG AMD GPU Miner v12.6 (Windows/Linux)  (Read 3839408 times)
    wll1rah
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    November 05, 2016, 03:01:30 AM
     #461

    The 7950/7970/280x were always the best mining cards due to their large memory bandwidth.

    If it wasn't for the DAG file in ETH they would still hash at 27MH/s.

    During the Litecoin days they hashed at 80% of the speed of a 290 and cost only 60% of the price. They were forgotten with ETH mining but are now back and killing RX480s.


    the easy answer for the RX480/ 470 owners your cards only have a 256-bit memory bus while the HD 7950/ 7970 & R9 280X have a 384-bit memory bus, so even with the slower memory they still have a greater bandwidth at 1750Mhz they bet  a Rx 480 at a clock of 2500Mhz in total bandwidth.
    In addition the color compression, i.e. frame buffer, was also reduced in the Polaris cards it went from 64 to 32, so without the software being written to take advantage of the memory optimization, on the RX series the memory just isn't utilized as efficiently.
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