Try hitting F11 to go full screen, I have no idea why but on my PC if I go maximise instead of hitting F11 I get god awful FPS, but if I use F11 it's all smooth!
^^ The problem is the thick HV cables, that image shows how long you can have a cable before it loses EU.
Swap the thick HV cable out for glass fibre and you should see an improvement straight away.
Nothing in the rules about swearing old bean!
If it is smp with no mystcraft then yeah thats not gonna work. It is a rare symbol but all it costs really is a couple of stacks of books, a stack of feathers and a shit ton of patience really