For comparison the Little River Cascade, Cascade SS, and Storm G4 waterblocks are also shown. It is clear from this graph that the Storm G5 is the best block ever manufactured by Little River Waterblocks over all flow rates. It is interesting to note that at very low flow rates (0.25 ), the G5 shows performance equal or better to the Cascade and Cascade SS while the G4 performs worse than the earlier blocks. Since the influence of silver in the Cascade SS had a very small effect on performance at lower flow rates, I would suspect that the higher nozzle/cup density of the G5 is responsible for its improved performance. This makes sense as more jets of smaller ID would lead to increased water velocity, and more cups of smaller size would improve surface area for cooling. As flow rates are increased to more realistic (0.5-1.5 GPM), the G5 just walks away from the other blocks. The combination of increased jet/cup density and silver base result in an improvement of 0.5-0.6C over the G4 at higher flow rates. Rather by luck or by careful design, it is clear that the jet impingement is extremely optimized in the G5.
Of interest to most readers is the performance of the Storm G5 waterblock plotted versus other commercial blocks I have tested:
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