Originally Posted by tlr3715
I just finished my first water loop for two graphics cards. My flow meter shows 1.5 LPM on max pump settings. What is an acceptable flow rate for a good water loop? I'm. Using the 1/2 tubing if that makes a difference.
Are you sure it is 1.5 LPM? its not in the wrong units or something simple like that?
If it is correct that is a pretty low flow rate. It isn't the end of the world and the system will still work, it just can mean some less than desirable side effects.
Low flow means each water block performs at less than its best and the core temp of the device will be higher. The water will heat much more between each water block so temps can be further raised if there are not rads between each block.
I find 3 Litres per minute quite good for stopping heating between components and just good performance. Around 3.7 LPM is the recommended rate for best all round system cooling by the people who do detailed testing.