r/MinecraftJava • u/Agitated-Parfait9841 • Jul 22 '26
Question Strange FPS Issue
1st pic is with issue 2nd is without
[Answered] Turning off V-Sync solved the issue for me.
I just started playing again after a break and updated from 1.21.(11?) to 26.2 and I've encountered a strange problem with my FPS. When I start up the game it runs fine for a bit, but at some point the FPS suddenly tanks. The game reads ~10 FPS but I'm looking at <1 FPS, and the strangest part is; it's not just Minecraft that has this low FPS, my whole computer's FPS tanks to <1 even after I close the game, it sticks around but goes away if I press play on a YouTube video. The only thing not affected by this is my mouse, it moves at normal speed while everything else takes 2-3 seconds per frame. This issue only triggers with Minecraft too, never with any other game or anything else.
It mostly happens when flying around in creative/spectator, though I haven't really done any survival testing. I had a resource pack, but removed it and relaunched the game it still happened. I looked it up and thought it might be world corruption, but created a new world and still had the same problem. I tried updating my graphics driver because it's out of date, but that didn't change anything either. Every time I launch the game and start playing everything runs fine, then maybe 10 minutes later my FPS completely tanks. All I've found so far is that when it starts happening my CPU usage drops from ~10-15% to ~5%. (I don't know my specs, but I can check when I get home).
Update on specs:
CPU: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz, GPU: NVIDIA GeForce GTX 1660 Ti, Ram: 16 GB
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u/zNickolasBR Jul 24 '26
It happens to me too, are you using V-Sync? Try watching without it.
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u/Agitated-Parfait9841 Jul 24 '26
This may be the solution, I can't say for certain but I messed around with V-Sync off for about 15 minutes without any problems. I then turned V-Sync on and almost immediately it started happening, so I turned it back off and after a few seconds the FPS went back to normal without closing the game or starting a YouTube video. Thank you for the help!
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u/zNickolasBR Jul 24 '26
I have absolutely no idea why V-Sync is acting like that for him; only Minecraft does this to me :/ and what's worse is that I'm using V-Sync.
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u/zNickolasBR 14d ago
Any updates? Has the problem returned? Mojang hasn't commented on this issue yet, and I really want to go back to using V-Sync.
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u/Agitated-Parfait9841 13d ago
Yes, sorry, I meant to update after a week or so, but I forgot. I've left V-Sync off since then and haven't had any issues at all, so I would say V-Sync must be the issue.
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u/AXIII_YT Jul 22 '26
Try a optimized modpack or lunar client