Terrible performance on FTB Infinity

[martinminecraft1]

Title Terrible performance on FTB Infinity

Launcher Type FTB Launcher

Modpack FTB Infinity

Modpack version 2.6.0

Have you modified the pack? No

Link to log file I am unable to provide a log file because the program seizes up my PC until it has been exited

Details of the issue I am getting absolutely horrendous performance on FTB Infinity, after trying to launch via both the FTB Launcher and Curse App. Once in game no matter what settings I am using I will get less than 1 frame per second constantly, and my CPU and Memory usage goes to 100%. This persists even when going back to the menu screen. I am having this issue on a fresh install of Infinity and have not modified the game files on the pack. I am on a fairly high end computer so this obviously is confusing.

Specs:
i7 6700k @ 4.6 GHz
MSI GTX 1070
500GB SSD/3TB HDD

 

[Scottly318]

How much ram?

 

[martinminecraft1]

16Gb, 4 allocated to game

 

[UniZero]

It sounds like something wrong with your system because the pack should not have an issue with your specs.

 

[martinminecraft1]

Was there a specific version of Java required for FTB? Maybe I can try reinstalling it.

 

[Scottly318]

Java 8 works well with infinity

 

[Aetherpirate]

If your PC has multiple GPU's, is Minecraft using the right one?

 

[martinminecraft1]

Yep, Minecraft's running off my GTX.

EDIT: When I join a server I have no trouble with performance, hitting 150 FPS on max settings. It's just on single player worlds where I really struggle

 

[Henry Link]

Sounds like in SSP something is bottleneck (memeory or CPU) and that is causing your performance issue. Have you considered running the local server on the same PC. That way it uses a different core and memory. I would 4 GB to the server and about 3GB to your client.

 

[martinminecraft1]

Sounds like in SSP something is bottleneck (memeory or CPU) and that is causing your performance issue. Have you considered running the local server on the same PC. That way it uses a different core and memory. I would 4 GB to the server and about 3GB to your client.

I could try running a server on the same computer, but I'd be very surprised that any parts in this build will be bottlenecking on a Minecraft Mod Pack. Besides, IIRC Minecraft doesn't support hyperthreading and will only ever attempt to run on Core 0. I have tried hosting a server and then joining it but the control panel completely seizes up and I am required to force quit it.

 

[Henry Link]

By running the server on the same machine it should use a different core from the client. But yes MC itself doesn't use multiple cores but Java does and can run things like the garbage collector in a different core/thread. You aren't restricting java to one core are you?