Originally Posted by microman
you will notice no difference between temps with just 360 and with the extra 120..
LOL! Ain't that the truth... folks forget the rads aren't like car rads in their purpose and use. The whole idea is to cool as close to ambient as possible, not maintain 180-200f in an engine.
On my OC'ed system, the rads don't even start working well until there is a larger ambient to water temp difference (as expected). The two Phobya temp meters I have show only 1c change inlet to outlet when idle and up to 2.8c difference running max'ed out with high pump flow.
In PC's, water cooling is a method to transfer heat from one object or another to the air and radiators simply don't do such a good job when close to ambient.
The warmer the water gets in relation to the air passing through, the more efficient they get to a point depending on air flow until they max out (which we probably never see without 200CFM screamers in push/pull).
But, that being the case, there is an argument for max performance to add as much radiator area as possible, especially in warm climates. An RX360+RX240 combo with 1500rpm Pu/Pl fans needs ambient air at 78f or less to keep the 4.25GHz 950 CPU below 80c in my system 100% loaded with HT on.
And RS-360 keeps my AMD 955BE 4.2GHz chip at around 43c +-2 fully loaded in 75f ambient with only 3 fans pushing... all depends on the setup... GPU's going to full load add 3-6c to temps on my systems.
I think he will be fine with his setup and I am reminded of the old saying...
"There is no better kill than OverKill!"