Memory throughput in ncu

As shown in above figure, when I profiled kernel performance using ncu, I found that Memory Throughput or DRAM Throughput is larger than 100% (106.01%)I was very confused and is there anyone who will give some explanation of the real meaning of this metric? Thanks so much

The “Memory Throughput” and “DRAM Throughput” metrics require multiple passes. This out of range metric value could be due to multiple passes. For further details, see the Range and Precision section in the Nsight Compute Kernel Profiling Guide.