So what is medium gallons per hour?

Thanks for the info!

i dont really know about it.
you need to do research about it
the reason i said medium gallons per hour is based on my theory that:

slowest water pump may cause heat trapped in cpu water block because of water that carry heats from water block move slowly instead of that the heat generated by the cpu is non-stop when cpu operate at full load or idle.

fastest water pump will cause water on the radiator moved fast and not have proper cooling.