Are you 100% sure the issue is with your GPU and not with the CPU? Or your hard drive? Because some RPG Maker games can make even beefy machines stutter. Case in point: I've had a fair share of VX Ace games drop the frames to around 20 on my machine, which sports an i7 and a GTX1070. The reason was shit optimization, the maps had a fuckload of events without proper "PASS/IGNORE IF" flags or whatever.
With MV, I'm playing Karryn's Prison and combat has several stutters. The dev's solution: "install the game on a SSD". Either the dev can't be bothered to join several files together and use as sprites (if the images are all large, I can understand this being a problem, imagine 300mb .png), or the engine is at a fault for loading a file and immediately unloading it from memory once it's not longer being shown.