diff --git a/bench/arty.py b/bench/arty.py
index 6d7af30..21b9333 100755
--- a/bench/arty.py
+++ b/bench/arty.py
@@ -133,7 +133,7 @@ def main():
     parser.add_argument("--with-analyzer", action="store_true", help="Add Analyzer")
     parser.add_argument("--load",          action="store_true", help="Load bitstream")
     parser.add_argument("--load-bios",     action="store_true", help="Load BIOS")
-    parser.add_argument("--set-sys-clk",   default=None,        help="Set sys_clk")
+    parser.add_argument("--sys-clk-freq",  default=None,        help="Set sys_clk_freq")
     parser.add_argument("--test",          action="store_true", help="Run Full Bench")
     args = parser.parse_args()
 
@@ -149,9 +149,9 @@ def main():
         from common import load_bios
         load_bios("build/arty/software/bios/bios.bin")
 
-    if args.set_sys_clk is not None:
+    if args.sys_clk_freq is not None:
         from common import s7_set_sys_clk
-        s7_set_sys_clk(clk_freq=float(args.config), vco_freq=soc.crg.main_pll.compute_config()["vco"])
+        s7_set_sys_clk(clk_freq=float(args.sys_clk_freq), vco_freq=soc.crg.main_pll.compute_config()["vco"])
 
     if args.test:
         from common import s7_bench_test
diff --git a/bench/common.py b/bench/common.py
index 4056d77..4381eed 100644
--- a/bench/common.py
+++ b/bench/common.py
@@ -284,3 +284,32 @@ def us_bench_test(freq_min, freq_max, freq_step, vco_freq, bios_filename, bios_t
     # # #
 
     bus.close()
+
+def us_set_sys_clk(clk_freq, vco_freq):
+    import time
+    from litex import RemoteClient
+
+
+    bus = RemoteClient()
+    bus.open()
+
+    # # #
+
+    # (Re)Configuring sys_clk.
+    print("Configuring sys_clk to {:3.3f}...".format(clk_freq/1e6))
+    uspll           = USPLL(bus)
+    clkout0_clkreg1 = ClkReg1(uspll.read(0x8))
+    vco_div = int(vco_freq/clk_freq)
+    clkout0_clkreg1.high_time = vco_div//2 + vco_div%2
+    clkout0_clkreg1.low_time  = vco_div//2
+    uspll.write(0x08, clkout0_clkreg1.pack())
+    # Measure/verify sys_clk
+    duration = 1
+    start = bus.regs.crg_sys_clk_counter.read()
+    time.sleep(duration)
+    end = bus.regs.crg_sys_clk_counter.read()
+    print("Measured sys_clk: {:3.2f}MHz.".format((end-start)/(1e6*duration)))
+
+    # # #
+
+    bus.close()
\ No newline at end of file
diff --git a/bench/genesys2.py b/bench/genesys2.py
index 414029d..171e7de 100755
--- a/bench/genesys2.py
+++ b/bench/genesys2.py
@@ -127,7 +127,7 @@ def main():
     parser.add_argument("--with-analyzer", action="store_true", help="Add Analyzer")
     parser.add_argument("--load",          action="store_true", help="Load bitstream")
     parser.add_argument("--load-bios",     action="store_true", help="Load BIOS")
-    parser.add_argument("--set-sys-clk",   default=None,        help="Set sys_clk")
+    parser.add_argument("--sys-clk-freq",  default=None,        help="Set sys_clk_freq")
     parser.add_argument("--test",          action="store_true", help="Run Full Bench")
     args = parser.parse_args()
 
@@ -143,9 +143,9 @@ def main():
         from common import load_bios
         load_bios("build/genesys2/software/bios/bios.bin")
 
-    if args.set_sys_clk is not None:
+    if args.sys_clk_freq is not None:
         from common import s7_set_sys_clk
-        s7_set_sys_clk(clk_freq=float(args.config), vco_freq=soc.crg.main_pll.compute_config()["vco"])
+        s7_set_sys_clk(clk_freq=float(args.sys_clk_freq), vco_freq=soc.crg.main_pll.compute_config()["vco"])
 
     if args.test:
         from common import s7_bench_test
diff --git a/bench/kc705.py b/bench/kc705.py
index 8aae474..57ac72a 100755
--- a/bench/kc705.py
+++ b/bench/kc705.py
@@ -127,7 +127,7 @@ def main():
     parser.add_argument("--with-analyzer", action="store_true", help="Add Analyzer")
     parser.add_argument("--load",          action="store_true", help="Load bitstream")
     parser.add_argument("--load-bios",     action="store_true", help="Load BIOS")
-    parser.add_argument("--set-sys-clk",   default=None,        help="Set sys_clk")
+    parser.add_argument("--sys-clk-freq",  default=None,        help="Set sys_clk_freq")
     parser.add_argument("--test",          action="store_true", help="Run Full Bench")
     args = parser.parse_args()
 
@@ -143,9 +143,9 @@ def main():
         from common import load_bios
         load_bios("build/kc705/software/bios/bios.bin")
 
-    if args.set_sys_clk is not None:
+    if args.sys_clk_freq is not None:
         from common import us_set_sys_clk
-        us_set_sys_clk(clk_freq=float(args.config), vco_freq=soc.crg.main_pll.compute_config()["vco"])
+        us_set_sys_clk(clk_freq=float(args.sys_clk_freq), vco_freq=soc.crg.main_pll.compute_config()["vco"])
 
     if args.test:
         from common import s7_bench_test
diff --git a/bench/kcu105.py b/bench/kcu105.py
index 0efc26f..f5669fb 100755
--- a/bench/kcu105.py
+++ b/bench/kcu105.py
@@ -148,7 +148,7 @@ def main():
     parser.add_argument("--with-analyzer", action="store_true", help="Add Analyzer")
     parser.add_argument("--load",          action="store_true", help="Load bitstream")
     parser.add_argument("--load-bios",     action="store_true", help="Load BIOS")
-    parser.add_argument("--set-sys-clk",   default=None,        help="Set sys_clk")
+    parser.add_argument("--sys-clk-freq",  default=None,        help="Set sys_clk_freq")
     parser.add_argument("--test",          action="store_true", help="Run Full Bench")
     args = parser.parse_args()
 
@@ -164,9 +164,9 @@ def main():
         from common import load_bios
         load_bios("build/kcu105/software/bios/bios.bin")
 
-    if args.set_sys_clk is not None:
+    if args.sys_clk_freq is not None:
         from common import us_set_sys_clk
-        us_set_sys_clk(clk_freq=float(args.config), vco_freq=soc.crg.main_pll.compute_config()["vco"])
+        us_set_sys_clk(clk_freq=float(args.sys_clk_freq), vco_freq=soc.crg.main_pll.compute_config()["vco"])
 
     if args.test:
         from common import us_bench_test
diff --git a/bench/xcu1525.py b/bench/xcu1525.py
index cc75d20..7660296 100755
--- a/bench/xcu1525.py
+++ b/bench/xcu1525.py
@@ -138,7 +138,7 @@ def main():
     parser.add_argument("--with-analyzer", action="store_true", help="Add Analyzer")
     parser.add_argument("--load",          action="store_true", help="Load bitstream")
     parser.add_argument("--load-bios",     action="store_true", help="Load BIOS")
-    parser.add_argument("--set-sys-clk",   default=None,        help="Set sys_clk")
+    parser.add_argument("--sys-clk-freq",  default=None,        help="Set sys_clk_freq")
     parser.add_argument("--test",          action="store_true", help="Run Full Bench")
     args = parser.parse_args()
 
@@ -154,9 +154,9 @@ def main():
         from common import load_bios
         load_bios("build/xcu1525/software/bios/bios.bin")
 
-    if args.set_sys_clk is not None:
+    if args.sys_clk_freq is not None:
         from common import us_set_sys_clk
-        us_set_sys_clk(clk_freq=float(args.config), vco_freq=soc.crg.main_pll.compute_config()["vco"])
+        us_set_sys_clk(clk_freq=float(args.sys_clk_freq), vco_freq=soc.crg.main_pll.compute_config()["vco"])
 
     if args.test:
         from common import us_bench_test