Minecraft Forums

I'm running Ubuntu Linux 12.10 on an AMD Phenom X4 955 and Radeon HD 7850. I get pretty superb performance with Optifine 1.5.2 HD D3 Ultra, but when I enable MultiCore rendering, my performance drops substantially, by 66% (90fps+->30fps @2560x1600).

When enabling multicore chunk loading, I can see the minecraft process jumps up to using 170% CPU vs 115% when Default chunk loading, so its obviously "working". Anybody else seen this behavior before?

I don't have linux and I still have the same problem. My frame rate drops from 41 to 24

_{I just reinstalled java and it went away, why don't you try doing that?}

And 90 fps is actually good enough, I don't see why you would need anything higher.