Every modpack I have lags

[LasieCZ]

Hey guys,

I've got problmem. My PC specs:

Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
AMD Radeon (TM) R9 390 Series
16 GB RAM
Microsoft Windows 7 Professional Edition Service Pack 1 (build 7601), 64-bit
Java 8 Update 51 (64-bit)

And as u can see, I got 59 FPS and lots of memory is remainig for use. I am playing The 1.7.10 pack and most of the other pack are ver. 1.7.10.

Can it be because of the bad version of java? Should I download Java 7? My brother has much lower PC then me and his minecraft is so smooooth  Or if anybody got an idea what to do to get the smooth minecraft.

And yes i tried to set everything on high and low and both is 55 FPS all the game.

Thanks for every answer ^^

Edited August 19, 2015 by LasieCZ

[Jon_]

What do you mean by "My brother has much lower PC"? What type of GPU & CPU he has?
Also if you want to improve your performance you can always try to manually install Optifine and customize its settings.