title: RTX 3080 LHR Missing gpu__dram_throughput CUDA metric
body: <p>As part of a machine learning project, we are optimizing some custom CUDA kernels.</p>
  <p>We are trying to profile them using Nsight Compute, but encounter the following error running on the LHR RTX 3080 when running a simple wrapper around the CUDA Kernel:</p>
  <pre><code>==ERROR== Failed to access the following 4 metrics: dram__cycles_active.avg.pct_of_peak_sustained_elapsed, dram__cycles_elapsed.avg.per_second, gpu__compute_memory_throughput.avg.pct_of_peak_sustained_elapsed, gpu__dram_throughput.avg.pct_of_peak_sustained_elapsed
  
  ==ERROR== Failed to profile kernel &quot;kernel&quot; in process 20204
  </code></pre>
  <p>Running a diff against the metrics available on an RTX 3080 TI (non-LHR) vs an RTX-3080 (LHR) via <code>nv-nsight-cu-cli --devices 0 --query-metrics</code>, We notice the following metrics are missing in the RTX 3080 LHR version:</p>
  <pre><code>gpu__compute_memory_request_throughput
  gpu__compute_memory_throughput
  gpu__dram_throughput
  </code></pre>
  <p>All of these are required for even basic memory profiling using Nsight Compute. All other metrics are correctly present, except for these. Is this a limitation of LHR cards? Why would they not be present?</p>
  <p>Details:</p>
  <ul>
  <li>Gigabyte RTX 3080 Turbo (LHR)</li>
  <li>Cuda Version: 11.5</li>
  <li>Driver version: 497.29.</li>
  <li>Windows 10</li>
  </ul>