have you tried going into appdata then to the tekkit folder in the technic launcher and opening the options file, then at the fps put it as high as you can and want c: just dont exaggerate, or maybe you haven't allocated enough ram? (though by now everyone should know this) anyways it worked for me I was getting 15fps and then set it to 50 because I had the option at 0 which.. its pretty bad, but its great and hope i help alittle