Windows .exe Lots Of Lag. But only for MindCrack pack.

[MinecraftingWizard]

Running Vanilla minecraft or FTB 1.4.2 i get fine FPS (60-100) But as soon as i start playing the mindcrack pack I get 25-30fps. Anyone know what could help fix the lag?

I use OptiFine and it hasn't helped much
I run both FTB packs w/ 1.5GB of RAM as well

 

[Nessiroj]

We can't fix that, the mods in the mindcrack (or any other) pack use more CPU / Mem then vanilla. This will make your FPS drop.
Can you post more PC specs so we can see if it's normal or not ion your case?

 

[MinecraftingWizard]

What other specs?

 

[Nessiroj]

CPU / RAM / GPU etc