Not lagging in Vanilla yet on FTB with 128x texture pack?

[Juelz0312]

When I run vanilla minecraft with Sphax 128x, I'm fine, and run at 60 fps.

When I run FTB Ultimate with Sphax 128x, I lag at least 0-6 fps. 10 if I'm lucky.

Why is it that vanilla seems to run the texture pack faster?

 

[KhrFreak]

because ftb has 60 plus mods installed and it's harder on your computer to run all of that then just vanilla

 

[Bickers]

ultimate has around 90 mods running each one adds a strain to your PC one thing to know about modded minecraft that you will never get the same FPS as you do in vanilla only thing you can do is lower the setting in minecraft or useing a x64 or x32 texture pack may help

 

[Juelz0312]

I did some research, and it could be that possibly FTB is not recognizing my graphics card, but it's using the integrated? If this is the case, how can I have my graphics card recognize FTB?

I have an iMac with AMD Radeon 6750M

 

[Bickers]

should be somewere in the ATI control panel or w/e its called im assumeing its a laptop? if there is a intergrated gfx card check in the BIOS