diff --git a/PC-optimization.md b/PC-optimization.md
index 4b99340..9aa0f61 100644
--- a/PC-optimization.md
+++ b/PC-optimization.md
@@ -16,6 +16,7 @@ To reduce desyncs, frame drops, and stuttering:
 * Always turn off VRR features - G-SYNC, FreeSync, Adaptive Sync should be always OFF.
 * Set GPU to "maximum performance" 
 * If your laptop has switchable graphics (iGPU + dGPU), make sure it's set to use the dGPU for spice.
+* Play at the right refresh rate; 60Hz for most games, and 120Hz for IIDX/SDVX when enabled. Sure, you can boot the game with various hacks at different refresh rate (like 165Hz) but there is no guarantee that the game will behave correctly.
 
 ## Audio
 * Prefer to use exclusive WASAPI or ASIO, and avoid shared mode WASAPI whenever possible.