diff --git a/PC-optimization.md b/PC-optimization.md
index e73f92e..86664f6 100644
--- a/PC-optimization.md
+++ b/PC-optimization.md
@@ -157,6 +157,7 @@ If you have no choice but to run on a laptop:
 ## pop'n music
 * Strongly recommended that you try `Low Latency Shared Audio` option for lower audio latency.
 * Try [popnhax](https://github.com/CrazyRedMachine/popnhax), which has various options for adjusting audio/visual offset. Ensure that your server allows this mod.
+* Popn tends to run at whatever refresh rate you had set on the desktop. Use `-graphics-force-refresh 60` to force 60Hz.
 * Popn seems to benefit greatly from enabling triple buffering (`-vsyncbuffer 3`) to minimize stutters.
 
 # Further reading / Reference