Vielleicht hilft euch ja ein crash-report:
---- Minecraft Crash Report ---- // I'm sorry, Dave.
Time: 26.12.13 11:58 Description: Rendering screen
java.lang.OutOfMemoryError at sun.misc.Unsafe.allocateMemory(Native Method) at java.nio.DirectByteBuffer.(Unknown Source) at java.nio.ByteBuffer.allocateDirect(Unknown Source) at net.minecraft.client.renderer.GLAllocation.func_74524_c(SourceFile:49) at net.minecraft.client.renderer.texture.Texture.(Texture.java:134) at net.minecraft.client.renderer.texture.Texture.(Texture.java:116) at net.minecraft.client.renderer.texture.TextureManager.func_94261_a(TextureManager.java:164) at net.minecraft.client.renderer.texture.TextureManager.func_98145_a(TextureManager.java:171) at net.minecraft.client.renderer.texture.Stitcher.func_94306_e(Stitcher.java:61) at net.minecraft.client.renderer.texture.TextureMap.func_94247_b(TextureMap.java:165) at net.minecraft.client.renderer.RenderEngine.func_94152_c(RenderEngine.java:610) at net.minecraft.client.renderer.RenderEngine.func_78352_b(RenderEngine.java:503) at net.minecraft.client.texturepacks.GuiTexturePackSlot.func_77213_a(SourceFile:146) at net.minecraft.client.gui.GuiSlot.func_77211_a(GuiSlot.java:250) at net.minecraft.client.texturepacks.GuiTexturePacks.func_73863_a(SourceFile:109) at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1156) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:871) at net.minecraft.client.Minecraft.run(Minecraft.java:760) at java.lang.Thread.run(Unknown Source)
A detailed walkthrough of the error, its code path and all known details is as follows:-- Head -- Stacktrace: at sun.misc.Unsafe.allocateMemory(Native Method) at java.nio.DirectByteBuffer.(Unknown Source) at java.nio.ByteBuffer.allocateDirect(Unknown Source) at net.minecraft.client.renderer.GLAllocation.func_74524_c(SourceFile:49) at net.minecraft.client.renderer.texture.Texture.(Texture.java:134) at net.minecraft.client.renderer.texture.Texture.(Texture.java:116) at net.minecraft.client.renderer.texture.TextureManager.func_94261_a(TextureManager.java:164) at net.minecraft.client.renderer.texture.TextureManager.func_98145_a(TextureManager.java:171) at net.minecraft.client.renderer.texture.Stitcher.func_94306_e(Stitcher.java:61) at net.minecraft.client.renderer.texture.TextureMap.func_94247_b(TextureMap.java:165) at net.minecraft.client.renderer.RenderEngine.func_94152_c(RenderEngine.java:610) at net.minecraft.client.renderer.RenderEngine.func_78352_b(RenderEngine.java:503) at net.minecraft.client.texturepacks.GuiTexturePackSlot.func_77213_a(SourceFile:146) at net.minecraft.client.gui.GuiSlot.func_77211_a(GuiSlot.java:250) at net.minecraft.client.texturepacks.GuiTexturePacks.func_73863_a(SourceFile:109)
-- Screen render details -- Details: Screen name: net.minecraft.client.texturepacks.GuiTexturePacks Mouse location: Scaled: (243, 131). Absolute: (973, 492) Screen size: Scaled: (480, 255). Absolute: (1920, 1020). Scale factor of 4 Stacktrace: at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1156) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:871) at net.minecraft.client.Minecraft.run(Minecraft.java:760) at java.lang.Thread.run(Unknown Source)
-- System Details -- Details: Minecraft Version: 1.5.2 Operating System: Windows XP (x86) version 5.1 Java Version: 1.7.0_45, Oracle Corporation Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation Memory: 261495168 bytes (249 MB) / 583000064 bytes (555 MB) up to 896073728 bytes (854 MB) JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1024m -XX:MaxPermSize=128m -Xmx884M AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used Suspicious classes: FML and Forge are installed IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 FML: MCP v7.51 FML v5.2.23.737 Minecraft Forge 7.8.1.737 Optifine OptiFine_1.5.2_HD_U_D5 68 mods loaded, 68 mods active mcp{7.51} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available FML{5.2.23.737} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available Forge{7.8.1.737} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available CodeChickenCore{0.8.7.3} [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available CoFHFramework{1.5.2.5} [CoFH Framework] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available ImmibisMicroblocks{55.0.7} [Immibis's Microblocks] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->A