Somebody help me speed, the Dolphin is slow in some parts in Twilight Princess GC...
And have you checked the ZTP speedhack in the game options?
It could be a bottleneck in the graphics. His CPU runs on HD-2500 which is significantly inferior to the 4000 series iGPUs. and his profile doesn't list a discrete graphics card.
Intel HD 2500 should handle 1x IR perfectly fine (especially in the latest development builds where Twilight Princess doesn't need EFB2RAM anymore)...