Hello, I have a custom modpack I made with 240+ mods and I experience a lot of lag spikes when playing. My FPS is usually 40+ but when I move around or look away my FPS goes down to 10. I don't run anything else other than Minecraft on my computer and I set javaw.exe's priority to High. I also allocated 7GBs of RAM to my Minecraft. I am also using Sphax PureBDCraft 64x for half of my mods. I also have installed Optifine with the minimum settings.
My PC specs:
Intel i5 2300 2.80 GHz
8GB RAM
ATI Radeon HD 5450
Windows 7 Home Premium
Java 64 Bit Version 7 Update 60
My PC specs:
Intel i5 2300 2.80 GHz
8GB RAM
ATI Radeon HD 5450
Windows 7 Home Premium
Java 64 Bit Version 7 Update 60
Mod List:
http://pastebin.com/vaZMycjB