I’ve tried clean install of Forge, change arguments of Java, versions of it to no result. It consumes much cpu and memory even at menu. I’ve noticed that it’s removal of Gregtech fixes this. I’ve tried gregtech_1.7.10-6.10.21.jar and
gregtech_1.7.10-6.08.00.jar. Both are lagging.
My config is:
AMD fx-8320e @ 4.2GHz
AMD Radeon R9 290
Force Vsync off in radeon settings (or nvidia panel) nearly doubles FPS. Please add this to FAQ, i think many will find this useful.