Zalman CNPS8000: A Worthy Successor to the 7000?
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typo patrol:
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page 3-It is quiet similar to Thermalright's XP-90 and XP-120 heatsinks
page 4-Because there are so few parts, putting the bracket together is quiet intuitive.
page 5-The small drop off at this less is somewhat of an empty victory
Zalman seem to have totally lost the plot on this one. Tightly-spaced fins need high static pressure to cool effectively, so you need high fan RPM, which = noise, and lots of it. Was this made while all the engineers were on holiday?????We have to shake our heads and wonder what Zalman thinking.
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Well, I don't think it's a total disappointment. Yes, there are far better heatsinks than 8000, but for a heatsink of this size, I think it manages to keep the temperature down to a reasonable level, albeit a bit high and at somewhat high noise level.
What makes me wonder, is how much better 8000 would have performed if the heatpipes were directly touching the base. Right now the heatpipes do not touch the base, instead they are attached to the fins which in turn are glued/soldered to the base. This is an inferior solution that lessens heatpipes effectiveness because heat must go through the base plate, then through the thin aluminum fins which have a limited capacity to carry heat and only then to the heatpipes. Pity...
What makes me wonder, is how much better 8000 would have performed if the heatpipes were directly touching the base. Right now the heatpipes do not touch the base, instead they are attached to the fins which in turn are glued/soldered to the base. This is an inferior solution that lessens heatpipes effectiveness because heat must go through the base plate, then through the thin aluminum fins which have a limited capacity to carry heat and only then to the heatpipes. Pity...
I am very disappointed with Zalman and very satisfied with the review.
This was one of the heatsinks, together with the AC Alpine that I had thought of as useful in a low noise, low profile HTPC (the NSK2400 for example).
Too bad both of them are really poor performers. Atleast the Alpine is quiet (which brings hope to cooler CPUs)
This was one of the heatsinks, together with the AC Alpine that I had thought of as useful in a low noise, low profile HTPC (the NSK2400 for example).
Too bad both of them are really poor performers. Atleast the Alpine is quiet (which brings hope to cooler CPUs)
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I think the photo is misleading you Jazz. It's true that the heatpipes pass through the outer fins, but the heatpipes do make direct contact with the base. The fins in the middle of the heatsink are cut away to allow this.
However, I do think that the base-to-heatpipe contact is a problem, not because there is an extra layer, but because the heatpipes only get about half the contact area they normally do. The bottom sides of the heatpipes are soldered directly to the base, but the top sides are reserved for the fins, which do not carry heat.
Unfortunately, I was unable to take a photo that could show the construction to my satisfaction; it's very difficult to photograph.
However, I do think that the base-to-heatpipe contact is a problem, not because there is an extra layer, but because the heatpipes only get about half the contact area they normally do. The bottom sides of the heatpipes are soldered directly to the base, but the top sides are reserved for the fins, which do not carry heat.
Unfortunately, I was unable to take a photo that could show the construction to my satisfaction; it's very difficult to photograph.
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Yes, the photos mislead me, looking at them I can't say that the heatpipes are touching the base. Even so, you are probably right about poor contact with base. As far as I can see (and I hope I'm not being mislead here again) the heatpipes are not "flattened out" as for example Scythe has done with ninja to improve contact. Even if proper soldering helps contact I would think flattening heatpipes would have helped even more.Devonavar wrote:I think the photo is misleading you Jazz. It's true that the heatpipes pass through the outer fins, but the heatpipes do make direct contact with the base. The fins in the middle of the heatsink are cut away to allow this.
However, I do think that the base-to-heatpipe contact is a problem, not because there is an extra layer, but because the heatpipes only get about half the contact area they normally do. The bottom sides of the heatpipes are soldered directly to the base, but the top sides are reserved for the fins, which do not carry heat.
Unfortunately, I was unable to take a photo that could show the construction to my satisfaction; it's very difficult to photograph.
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