The pump is already barbed for 3/4 hose so I was thinking it was probably designed to pump through 3/4 hose (yes I know brilliant observation
). I don't know if this is correct but I was under the imression that the pump fighting against the backpressure resulting from reducing the hose to 1/2 or even 7/16 would lead to added heat in the loop from the pump. Well the bottom line question is would I be better off with 3/4 inch hose from a custom res (that I am building) out to a 3/4 inch barb on a manifold that splits into (2) 1/2 inch barbs, one that goes to the cpu and one to the gpu. I was thinking this would lead to less restiction, right. Or would I still be better off with a reducer and a regular loop ( pump > cpu > gpu > BIPII > BIPII > res....).