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Originally Posted by Ruiner
Do these trends persist with an extra 70 watts of gpu heat in the loop?
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The information is there. Plug it in and have a look. Assume that the GPU block reduces the flow rates by 10% for any particular pump (crude, but probably a fair rough estimate for a moderate PD GPU block), add in 70W, and crunch the math.
GPU's won't dump 70W though, more like 50W, unless the GPU block is cooling the memory as well.
Higher heat loads does tend to make the impact of the pump's heat slightly less significant.
Okay - let's do a quick assessment:
MD20RZ @ 60Hz vs MD30RZ @ 60Hz, dual-fan radiator, etc, etc, 70W GPU heat.
60Hz 20RZ => 31W pump heat, 7.8LPM, 0.040, 0.162
60Hz 30RZ => 63W pump heat, 10.5LPM, 0.039, 0.157
20RZ => 100 x 0.162 + 201 x 0.04 => +24.2C
30RZ => 100 x 0.157 + 233 x 0.039 => +24.8C
As you can see, makes almost no difference.