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My game crashes whenever i use forge. I have 3gb allocated to the game. On my optifine profile i get 120+ fps. When using no mods in forge i just lag with 10 fps or lower.

My Crash Report is Below.

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Who set us up the TNT?

Time: 2/27/17 6:45 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderException: java.lang.OutOfMemoryError: Direct buffer memory
at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:162)
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:731)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:307)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:495)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.OutOfMemoryError: Direct buffer memory
at java.nio.Bits.reserveMemory(Bits.java:658)
at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
at net.minecraft.client.renderer.GLAllocation.func_74524_c(SourceFile:37)
at net.minecraft.client.renderer.WorldRenderer.<init>(WorldRenderer.java:66)
at net.minecraft.client.renderer.RegionRenderCacheBuilder.<init>(SourceFile:18)
at net.minecraft.client.renderer.chunk.ChunkRenderDispatcher.<init>(SourceFile:47)
at com.github.lunatrius.schematica.client.renderer.chunk.OverlayRenderDispatcher.<init>(OverlayRenderDispatcher.java:15)
at com.github.lunatrius.schematica.client.renderer.RenderSchematic.<init>(RenderSchematic.java:99)
at com.github.lunatrius.schematica.client.renderer.RenderSchematic.<clinit>(RenderSchematic.java:68)
at com.github.lunatrius.schematica.proxy.ClientProxy.init(ClientProxy.java:183)
at com.github.lunatrius.schematica.Schematica.init(Schematica.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:559)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:729)
... 10 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.8.8
Operating System: Windows 10 (amd64) version 10.0
CPU: 4x Intel(R) Core(TM) i3-4005U CPU @ 1.70GHz
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 82695648 bytes (78 MB) / 241631232 bytes (230 MB) up to 241631232 bytes (230 MB)
JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn328M -Xmx256M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.18 Powered by Forge 11.15.0.1655 Optifine OptiFine_1.8.8_HD_U_H6 5 mods loaded, 5 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHI mcp{9.18} [Minecraft Coder Pack] (minecraft.jar)
UCHI FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.8-11.15.0.1655.jar)
UCHI Forge{11.15.0.1655} [Minecraft Forge] (forge-1.8.8-11.15.0.1655.jar)
UCHI LunatriusCore{1.1.2.31} [LunatriusCore] (LunatriusCore-1.8.8-1.1.2.31-universal.jar)
UCHE Schematica{1.7.7.141} [Schematica] (Schematica-1.8.8-1.7.7.141-universal.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.3.0 - Build 20.19.15.4549' Renderer: 'Intel(R) HD Graphics 4400'
OptiFine Version: OptiFine_1.8.8_HD_U_H6
Render Distance Chunks: 8
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.3.0 - Build 20.19.15.4549
OpenGlRenderer: Intel(R) HD Graphics 4400
OpenGlVendor: Intel
CpuCount: 4

Remove the -Xmx256M from your JVM arguments

How do i do that?

Is still there

This is all thats in my jvm arguments

in a command prompt, type echo %_JAVA_OPTIONS%

This mean im good now?

Uninstall Razer Synapse and delete it from enviroment variables

I don't Have Razer Synapse installed on my computer.