What texture pack are you using if any maybe try lowering your graphical settings just a thought optifine may help thats all I can think of for now.
Thanks, really appreciate all the help! I'm not using any texture packs, and the problem persists with minimum settings. I'll try optifine though.
Seems to be kinda hit or miss with 1.7.10 modpacks. I don't have the greatest pc of all time, but I was able to play some other 1.7.10 packs - last I remember was bevo's tech pack with unity(?) texture pack and maxed settings - and was floating around 100 FPS. But then some packs I can't play with default and minimal settings. I don't know, maybe optifine will work