diff --git a/PC-optimization.md b/PC-optimization.md
index ba980fc..ebb5472 100644
--- a/PC-optimization.md
+++ b/PC-optimization.md
@@ -113,7 +113,7 @@ If you are failing to keep a steady framerate, check for background services, es
 * If you have an underpowered PC & experience stutters while playing, you could try disabling the video.
   * You can accomplish this by going to the blue menu in song select and changing Camera Display Position to show the camera instead of the BGAs. If you don't have a camera, it'll just show a black box, saving you from a lot of CPU cycles.
   * You may also be able to find patches (hex edits) that disable video entirely.
-* For iidx27-30, LDJ patched to run at 120Hz tends to use less resources than TDJ. For iidx31+, not a huge difference due to legacy cab hardware upgrade kits.
+* For iidx27-29, LDJ patched to run at 120Hz tends to use less resources than TDJ. For iidx30+, not a huge difference due to legacy cab hardware upgrade kits.
 * If you get bad monitor check or unsteady framerate after enabling Cam Hook feature, turn down the camera resolution and framerate. See [the wiki page](https://github.com/spice2x/spice2x.github.io/wiki/IIDX-Camera-Hook) for more details.
 
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