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RX Vega 56 Not Reaching Advertised Boost Clock

Question asked by tooqik on Sep 21, 2017
Latest reply on Jun 12, 2018 by yoshimatsu414



I've recently purchased a Sapphire Radeon RX Vega 56 and have noticed that it won't reach the advertised boost clock of 1471 MHz when running either the Balanced or Turbo profiles from within Wattman. The highest clock speed I've seen is 1440 MHz, which while close is still under performing. This maximum clock is repeatable when running both the Heaven and Superposition benchmarks, as well as any 3DMark benchmarks.


Looking at the card temperatures, I'm seeing the core temperature max out around 70 degrees and the memory temperature around 80 degrees (both Celsius).


The card does have a lot of coil whine, although is more of a clicking than a whine when under stress, so I'm trying to determine whether this noise plus the inability to reach 1471 MHz is actually a fault or simply expected behaviour.


Thanks in advance for any feedback.