After trying a million different settings this is how I got the game to run properly without messing with video or monitor settings.
 
 

How To Get Rid Of Stuttering & Lag

1. Turn Off Internet / Turn Airplane Mode ON

 
 
Proof:
 
 

 
 
0:15 Playing with Airplane Mode ON (NO INTERNET & NO LAG)
 
4:21 Turned Airplane mode OFF (INTERNET ON & LAG)
 
4:40 Stutter/Lag
 
5:41 Stutter/Lag
 
6:41 Stutter/Lag
 
7:41 Stutter/Lag
 
 
PC:
 
Windows 10 Pro 64-Bit
 
AMD Ryzen 9 3950X
 
ASUS ROG STRIX RTX 2080 Ti
 
Corsair MP600 2TB Gen4 M.2 SSD
 
Corsair 4 x 8GB DDR4 3200
 
 
Monitors:
 
ASUS ROG PG27U 4K HDR 120HZ G-SYNC (Primary)
 
ASUS XG16A 1080P 120Hz G-SYNC (Secondary)
 
 
Driver:
 
GeForce Game Ready Driver 512.95, 05/24/22
 
 
Thank you for coming to my TED Talk.
 
 

 
 
I hope you enjoy the Guide we share about Hatsune Miku: Project DIVA Mega Mix+ – How to fix game stuttering & lag in game; if you think we forget to add or we should add more information, please let us know via commenting below! See you soon!