Ninja 2 spotted on CeBIT [Large-ish images]
Moderators: NeilBlanchard, Ralf Hutter, sthayashi, Lawrence Lee
Looks interesting. I count a couple of more fins than the rev B. I could very well be wrong though.
I wonder what effect the hole in the middle will have. From my basic understanding of fluid mechanics, I wouldn't think that it is a positive thing (ie. more turbulent flow, therefore less velocity, therefore less heat transfer). I guess I'll just have to wait until SPCR gets their hands on one.
I wonder what effect the hole in the middle will have. From my basic understanding of fluid mechanics, I wouldn't think that it is a positive thing (ie. more turbulent flow, therefore less velocity, therefore less heat transfer). I guess I'll just have to wait until SPCR gets their hands on one.
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Hello,
I count 27 fins, vs 23 for the previous versions. I see that the lack of "slots" on the corners will make it very hard to use through-the-motherboard screws -- hopefully their stock mounting is much improved!
[Edit: corrected fin count.]
I count 27 fins, vs 23 for the previous versions. I see that the lack of "slots" on the corners will make it very hard to use through-the-motherboard screws -- hopefully their stock mounting is much improved!
[Edit: corrected fin count.]
Last edited by NeilBlanchard on Fri Mar 07, 2008 7:58 pm, edited 1 time in total.
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Blue_sky: The hole in the center will serve the same purpose as the hole in the center of the current Ninja - to reduce the effects of skin friction drag on the airflow. With a powerful fan, the hole wouldn't really do very much, but with a slow fan or only ambient airflow, it makes a significant difference in keeping the air moving through the heatsink. And it's pretty far from any heatpipes, so material in that position probably wouldn't dissipate much heat anyway.
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I like that theyve spaced the heatpipes evenly like they did with the Cu design. I often wonder how much the middle heatpipe on the rev b actually cools, seems too close to the others.
Overall seems little has changed other than that and the corner of the fins. I can see installation being tricky still, not much room for any tools under those fins, although the bottom 3 are much smaller than the rest, this might make it more spacious than it first looks.
Overall seems little has changed other than that and the corner of the fins. I can see installation being tricky still, not much room for any tools under those fins, although the bottom 3 are much smaller than the rest, this might make it more spacious than it first looks.
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Looks to be around the same witdh and length based on the size of the base and heatpipes. Height is impossible to say, but it looks like the fins are closer together (inevitable i guess, it should be aiming at TRUE's cooling crown, passive users are a small market) and i count 23 large fins and 3 small ones, so slightly more, would make sense if they kept the same height and just moved the fins closer together.
The weight id expect to be somewhere in between the revB and the Cu versions.
The weight id expect to be somewhere in between the revB and the Cu versions.
I wasn't paying attention to what I was writing (I swear I know there is a hole in the current ninjas ).tehcrazybob wrote:Blue_sky: The hole in the center will serve the same purpose as the hole in the center of the current Ninja - to reduce the effects of skin friction drag on the airflow. With a powerful fan, the hole wouldn't really do very much, but with a slow fan or only ambient airflow, it makes a significant difference in keeping the air moving through the heatsink. And it's pretty far from any heatpipes, so material in that position probably wouldn't dissipate much heat anyway.
What I wanted to say, is that I wonder what effect changing the geometry will have, if any.
I've done some finite element models of heatsink-air heat transfer, and that has lead me be a little wary of anything that can cause more turbulent flow - the total heat transfer over time took a pretty big hit as velocity dropped and turbulence increased.
I don't have much experience in the area, nor do I work in the field, so I'm just interested to see how the actual performance differs from what I would have expected.
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Not really. Just cut away the parts of the fins that get in the way. That part of the fin structure doesn't do anything anyway because there's no airflow there.JazzJackRabbit wrote:Hm, I like higher fin count, spread-out heatpipes, and better finished base by the looks of it, but no slits at the corner make it impossible to use TR bolt-through kit now.
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Right.... I'm not about to make 24x4 fin cuts.cmthomson wrote:Not really. Just cut away the parts of the fins that get in the way. That part of the fin structure doesn't do anything anyway because there's no airflow there.JazzJackRabbit wrote:Hm, I like higher fin count, spread-out heatpipes, and better finished base by the looks of it, but no slits at the corner make it impossible to use TR bolt-through kit now.
It's probably sufficient to cut the bottom 5 or 6 fins.JazzJackRabbit wrote:Right.... I'm not about to make 24x4 fin cuts.cmthomson wrote:Not really. Just cut away the parts of the fins that get in the way. That part of the fin structure doesn't do anything anyway because there's no airflow there.JazzJackRabbit wrote:Hm, I like higher fin count, spread-out heatpipes, and better finished base by the looks of it, but no slits at the corner make it impossible to use TR bolt-through kit now.
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