Consider also that the wiki states there's a hard limit of "about 8000EU/t" so my maths say that although you may be able to power more than 20 OCs, they won't provide any benefit.
Kind of like paying $10,000 for a kebab. The man will happily take your money but it doesn't get you any more kebab than you would've gotten for $7.
ITS ABOUT THE WHY NOT! NOT THE WHY!
anyway i found the breakpoint to be at 13 for the furnace i'll check if any of the others are differnt this puts the output at afraction over 1 tick per operation, i doubt it'd be noticable.