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Originally Posted by Albigger
How significant the spreading is will depend on the specific waterblock cooling properties, I suspect. However the variance may be negligible, again, won't know till we try to quantify it. ...
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Wrong (mostly); the heat flux flows through the IHS regardless of the cooling solution. The heat flux however may take a bit of a variable path, but in no way significant to the effect of the IHS itself; the IHS is pretty good at smoothing things out, as is the baseplate of the water block itself.
Specifically, if the heat flux is concentrated within a smaller area, then there's a "hot spot" and conversely, if the heat flux is spread out, then the overall temperature is lower, but the flux remains the same.
The size of the area through which the heat flux flows can have an impact on the performance of a water block. As we've demonstrated though, it's not significant.
Al, agreed, comparing the two would be interesting, just to put out this issue. FYI, Storm's design would be most susceptible to the difference. The big Q though; can it be compensated with an offset?