FTB Unleashed 1.1.3 Start freezing then crash

[goldern]

PC Configs:
-Intel Core i5 2310 2,9~~3,2ghz
-8Gb DDr3
-Geforce EVGA GTX 650 2Gb GDDr5

I've been running FTB Unleashed Modpack 1.1.3 for some time with all mods enabled except Deathtimer and 2,5Gb dedicated only to the modpack, but sometimes it uses 3Gb+ and start spamming at the console "[Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?". I don't have a clue on what's happening and it starts well with no problem.
I've also added 2 other mods from DW20 modpack and they run with no problem, they're Translocators and additional buildcraft objects. With no more info to put here, my console log is in this paste:
http://pastebin.com/hvpfUDV8
Edit: Also i'm not trying to run a server, i'm playing on singleplayer by myself and this is happening

 

[Vauthil]

Moved to Tech Support.

Mod Pack Bugs is strictly for dealing with specific cause-effect items with the mod packs as they are distributed (the forum really is there for the Mod Pack Team and mod authors to see things to fix, not to diagnose problems). As you're still troubleshooting and as you've mix-and-matched, you'll want Tech Support. If something with the mod pack itself is ascertained as an issue we can merrily circle back and make a report.

 

[goldern]

Thanks for moving the topic.
Do you have any clue on what could be causing this?

 

[UniZero]

Update java for a start. You should be running java 7. Be sure to remove any old versions.

 

[Eyamaz]

Java currently uses 3 separate sections of memory called Heap, PermGen, and CodeCache. The one you set via the launcher is the Heap, this is we're your data arrays are stored.
The other two are for interpreted and compiled code respectively and what is raising your RAM usage over what you think you are limiting java to.

Check the link in my signature about JVM arguments to try to help alleviate your over burdening.

 

[goldern]

I've added

Spoiler

-XX:TargetSurvivorRatio=80 -XX:MaxTenuringThreshold=31 -XX:+UseParNewGC -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=40 -XX:GCPauseIntervalMillis=400 -XX:+TieredCompilation -XX:ReservedCodeCacheSize=2048m -XX:+UseCodeCacheFlushing -XX:CompileThreshold=1000

in additional java arguments but when the FTB logo open in the game it load and closes after 5-15 seconds, some kind of crash.
what am i doing wrong?
Edit: Changed ReservedCodeCacheSize to 1024m and now it's working.
Edit2: After some time playing with these configs, a crash appeared: http://pastebin.com/Y5AJznJH

 

[goldern]

Bump
it crashed 3 or 4 times till now, i don't have any clue about what's causing crash.
the unleashed just get 0 FPS, lag as hell and close with no crash report.
Any program or thing needed to see what's happening or someone know what's happening?
Edit: Tried 'Ashzification' method to crash (F3 + C for 10 seconds) and got this log: http://pastebin.com/aKqBUdDu
Edit2: Also noticed that sometimes the sound suddenly stops playing, it lags a bit and it don't return till crash or rebooting minecraft

 

[Eyamaz]

You need to uninstall all your java and update to the latest edition of java 7 from oracle.

 

[goldern]

I'll try to do it then i'll update this post once finished.
Should i install 64 and 32 bits or only 64 is fine?

 

[Eyamaz]

Only 64bit

 

[goldern]

It seems like the problem was the old version of java.
Thanks for the help!!!
Edit: The crashing thing was fixed, but now sometimes my FTB suddenly close without any reason.
No crash report or nothing, it just close automatically.