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Cathar · 08-09-2005, 05:08 PM

Hmmm, if targetted peak flow is in the 180-200gph mark, then by reducing impeller speed by 20% we'd be talking about getting down to 144-160gph, which is getting too low for some of the higher flow focused blocks (e.g. Asetek Antarctica, White Water, DD RBX/TDX) once we factor in typical system resistances. Now by "too low" I really mean very marginally less than optimal and such a pump would still be clearly better than anything else flow/pressure/heat wise

So if that's the case, then a compromise at 90% of the OEM RPM speed then, which should also still keep Dave happy for purposes of motor loading. That would reduce power draw to approximately 20-24W, for a heat dump in the ~17-20W range, which is still very, very nice, if just a touch high. No more than 16W heat dump is what I was hoping for, but hey, beggars can't be too choosy. I'm just hunting for that last 0.1-0.2C as usual.

Dave, not sure why they'd be following my specs. My pump specs are derived from intensive analysis of parameters very particular to PC water-cooling only, and certainly are not generic for all scenarios. I'd say perhaps just a chance of lucky co-incidence.

08-09-2005, 05:08 PM	#14
Cathar Thermophile Join Date: Sep 2002 Location: Melbourne, Australia Posts: 2,538	Hmmm, if targetted peak flow is in the 180-200gph mark, then by reducing impeller speed by 20% we'd be talking about getting down to 144-160gph, which is getting too low for some of the higher flow focused blocks (e.g. Asetek Antarctica, White Water, DD RBX/TDX) once we factor in typical system resistances. Now by "too low" I really mean very marginally less than optimal and such a pump would still be clearly better than anything else flow/pressure/heat wise So if that's the case, then a compromise at 90% of the OEM RPM speed then, which should also still keep Dave happy for purposes of motor loading. That would reduce power draw to approximately 20-24W, for a heat dump in the ~17-20W range, which is still very, very nice, if just a touch high. No more than 16W heat dump is what I was hoping for, but hey, beggars can't be too choosy. I'm just hunting for that last 0.1-0.2C as usual. Dave, not sure why they'd be following my specs. My pump specs are derived from intensive analysis of parameters very particular to PC water-cooling only, and certainly are not generic for all scenarios. I'd say perhaps just a chance of lucky co-incidence.