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Stack alphacool dc-lt together ? Should I use small ID tube to get better flow rate or better temp ?

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Software Windows 10
I have two questions since i have an Alphacool eisbaer solo and a 360mm radiator, i use soft tube with i/d 9.5mm i intend to use smaller i/d tube like 6 or 8mm will it give me better results ?, the default pump of mine is 72l/h which i think is too weak, i intend to use 2 more 72l/h alphacool to the loop. I just want to have an easy install and remove set up since i always change my main rigs so i switch to soft tube instead of hard acrylic tube. AIO is not an option for me since i prefer 360/420/480 copper radiator then most AIO aluminum radiator. Should purchase silverstone tundra AIO which i believe the pump is 200-250l/h or to enermax 400-500 l/h and change the aluminum radiator to copper ?!
i'm using 1700x 4.0 1.45volt cinebench temp is 70*c with a slim magicool radiator ambient temperature is around 29-30*c , i will purchase 9900k which i believe is hotter and expect to fulload around 80-90*c with intel burn test or prime95 .
 
Less cross-sectional area for flow = higher head loss = less flow for a given pump config = higher temperatures
period... end of story... end of debate... case closed
 
Flow is better with larger tubes, more water moved the better.
 
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