Er... some contradicting info...
"In a 120mm form factor, for single-row cores single-pass can work better for flow-rates above 4-6LPM, but dual-pass is arguably better across the board."
In this part u mention that dual pass is arguably better across the board. well u got this part right. but the single pass section says otherwise.

Also you seem to always state that most radiators are made of aluminium. Well I don't know how much is the ratio... but there are also plenty of radiators made of copper. I would STRONGLY advice NOT to mix metals in a water cooling loop, even if the aluminium parts are anodized or you use a corrosion inhibitor. NO corrosion inhibitor can fully prevent galvanic corrosion. User experiences have shown that despite having anodized aluminium and coolants containing corrosion inhibitors, there is is still notable corrosion within 18 months. On a side note, copper radiators are actually a combination of copper(fins) and brass(tubes). brass is copper+zinc and they will not have galvanic corrosion with copper. Thus I always use all copper/brass components. I don't even use coolant additives, but just distilled water with Tygon's antimicrobial tubings to prevent algae growth.

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Good article but there are a number of errors

There is a factual error in this part describing pumps:
"This is the maximum height that a pump can sustain its stated flow rate before it begins losing its capabilities. So, if you see a pump with a max “Head” of, say, 36 inches and it pumps water at 317gph, it will continue to do so unless it had to go beyond that spec."
Actually this is false. The rated 317gph will only be achieved at ZERO height and restriction. at 36 inches of water height, there is ZERO flow. the pump is just able to sustain that height of water and will not pump any more. thus flow=zero at max head. the pump gradually loses its max flow as the delivery height(or restriction) increases.

Your description of single pass radiators is errornous. the differences in core temperatures are too small to present a significant benefit. a dual pass in general will probably have better performance. water spends more time inside the radiator core than a single pass. some ppl say a single pass has less restriction than a dual pass. oddly enough, some tests have shown that the black ice X-flow (single pass) has the same amount of restriction as the dual pass model. also, independent tests have also shown that in most cases a dual pass rad of the same model beats a single pass. also, single pass or dual pass does not dictate the airflow restriction. thus your statement that "Single pass designs are desirable because you can get good performance with low noise as they don’t require as much pressure to get good airflow through them" is false. Airflow restriction is equally the same with a single pass and dual pass of the same radiator model. single or dual pass only affects the water flow, not airflow. airflow restriction is dictated by the fin density and core thickness.

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