diff --git a/configs/ruby/GPU_VIPER.py b/configs/ruby/GPU_VIPER.py
index dc99429b47..aa3fc2cd35 100644
--- a/configs/ruby/GPU_VIPER.py
+++ b/configs/ruby/GPU_VIPER.py
@@ -373,7 +373,9 @@ def define_options(parser):
     parser.add_argument("--WB_L2", action="store_true", default=False,
                         help="writeback L2")
     parser.add_argument("--TCP_latency", type=int, default=4,
-                        help="TCP latency")
+                        help="In combination with the number of banks for the "
+                        "TCP, this determines how many requests can happen "
+                        "per cycle (i.e., the bandwidth)")
     parser.add_argument("--TCC_latency", type=int, default=16,
                         help="TCC latency")
     parser.add_argument("--tcc-size", type=str, default='256kB',