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Water Block Design / Construction Building your own block? Need info on designing one? Heres where to do it

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Unread 08-27-2002, 06:01 AM   #1
Volenti
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Lookie what I just got

it's a 1U rackmount p4 heatsink, see if you can guess what I'm going to do with it
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Unread 08-27-2002, 08:26 PM   #2
gone_fishin
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OK, I'll be the first to guess
You are going to encase it with a copper cover soldered in place (if the screws shown in the picture are the mount hole positions then them are some large barbs).
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Unread 08-27-2002, 09:29 PM   #3
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Quote:
Originally posted by gone_fishin
OK, I'll be the first to guess
You are going to encase it with a copper cover soldered in place (if the screws shown in the picture are the mount hole positions then them are some large barbs).
correct their 1'' barbs actually. I have a bit of mucking around to do on the ends to try and distribute the flow a bit, but it isn't going to hurt to have most of the flow going through the middle part of the block, if some of the outside fins get bugger all flow I'm not going to loose any sleep over it.

Other than the fin area being a little too large (for water cooling), I can't see any reason why it won't perform exceptionally well.
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Unread 08-28-2002, 02:30 AM   #4
Can O' Beans
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Is that a skived copper heatsink?


If so, I was looking for a HS exactly like that one!!

Where'd you get it? Or list a name so I can Google
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Unread 08-28-2002, 03:01 AM   #5
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Quote:
Originally posted by Can O' Beans
Is that a skived copper heatsink?


If so, I was looking for a HS exactly like that one!!

Where'd you get it? Or list a name so I can Google
yes, I got mine through a local supplier, the heatsink web site is here
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Unread 08-28-2002, 11:26 AM   #6
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either that is a lot of dence fins or its the base... waht is it?
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Unread 08-28-2002, 09:25 PM   #7
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Quote:
Originally posted by maskedgeek
either that is a lot of dence fins or its the base... waht is it?
it isn't very clear in that pic, here's a better one showing the fins.

the blurry ruler in the foreground is metric
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Unread 08-30-2002, 01:48 PM   #8
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With high pressure, I think you may have a good idea ... keep us in tune.
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Unread 08-30-2002, 02:40 PM   #9
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This isn't a skived fin HS, but it's very nice! What's your watercooling conversion plan?
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Unread 08-30-2002, 03:18 PM   #10
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first your gonna cut out the area below the barbs so it can go to all fins rite? ten your gonna make it copper rite? the rest of it? i hope so. this thing will be mad cool!
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Unread 08-30-2002, 07:51 PM   #11
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Quote:
Originally posted by bigben2k
This isn't a skived fin HS, but it's very nice! What's your watercooling conversion plan?
hmm, I was under the impression that it was, I thought that was the only way they made these thin fin heatsinks?

oh yea I'm working on it this weekend (going to get some bits for it very soon in fact) I'll post update shots as I go, though for the moment I may only go with 3/4'' barbs sinse I still havn't got my 1'' plan sorted out yet, 3/4'' will be a lot easier to temporally set up.
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Last edited by Volenti; 08-30-2002 at 08:11 PM.
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Unread 08-30-2002, 09:04 PM   #12
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It won't be easy to get enough water between those fins.
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Unread 08-30-2002, 09:22 PM   #13
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I have a heatsink almost just like that.... well not anywhere near like that now that I look at it. Its a xeon heat sink. Would make a cool water block, except that its copper and aluminum. Bigger then any heatsink I have ever seen.
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Unread 08-30-2002, 11:59 PM   #14
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Default One place to find a 1U copper sink

www.rackmountpro.com carries these, but they're $20/each and the shipping prices are horrendous.
They also carry one for an Athlon, which seems to work pretty well (for a 1U HSF on a Duron 1300...)

And not to contradict bigben2k, but it looks like it is skived, I know the Athlon ones we've got are, and the pic above certainly looks very similar.
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Unread 08-31-2002, 01:10 AM   #15
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Ok I've done my shopping and have a length of 3/4'' hard drawn copper pipe (that I'll flare and use as hosebarbs) it has an internal area of 227mm/2, after attacking the heatsink with a ruler and some educated guesswork on the thickness of the fins I've come up with a "channel" area of 432mm/2.

That's actually ideal for the 1'' I was originally planning, but I don't think I'll have room for the geometry needed to get that flow too all the fins properly, so 3/4'' it is. However since I don't want to have the water flow slowing down in the block (re; water block theory) I'll direct the water flow through only the centre of the block, through a roughly equivilant fin area. like so;

this also has the benifit of greatly simplifing the construction, something I won't be complaining about
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Unread 08-31-2002, 02:09 AM   #16
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and here's the results after trimming the "un-needed" fins off
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Unread 08-31-2002, 09:30 AM   #17
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just curious, how did you trim off those extra fins? it looks very even, like you took a mill or something to it..
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Unread 08-31-2002, 11:37 AM   #18
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I may not have the right understanding of "skived", but anyways...

You're on the right track. The challenge is going to force the flow between the fins, and that's going to mean keeping the lid right on top of the fins, or at least very close.

At this point, you've probably already thought about some kind of manifold, to allow the water in and out. In one side, through the fins, and out the other. Right? Right...
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Unread 08-31-2002, 07:26 PM   #19
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Quote:
Originally posted by maskedgeek
just curious, how did you trim off those extra fins? it looks very even, like you took a mill or something to it..
no milling involved, I simply used a hack saw (carefully) and cleaned up a bit with a file.


Quote:
Originally posted by bigben2k
I may not have the right understanding of "skived", but anyways...

You're on the right track. The challenge is going to force the flow between the fins, and that's going to mean keeping the lid right on top of the fins, or at least very close.

At this point, you've probably already thought about some kind of manifold, to allow the water in and out. In one side, through the fins, and out the other. Right? Right...
Oh yea, that's pretty well exactly what I'm doing, the water won't have any choice but to go through the fins , it doesn't show up very well in the pictures, but the fins are very thin, they are only a quarter to a third as wide as the gap between each fin.

anyway I've been a bit generous with the flow passage to try and compensate for any friction or weird boundary layer based flow restriction, I should have it finished today so we'll find out
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Unread 09-01-2002, 12:50 AM   #20
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how many fins does that thing have? like 100 on each side?

that should be an ultra cool block, lets just hope you can seal it all ok
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Unread 09-01-2002, 01:51 AM   #21
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Quote:
Originally posted by Brad
how many fins does that thing have? like 100 on each side?

that should be an ultra cool block, lets just hope you can seal it all ok
it originally had 78 fins, it has about 58 now (cut 10 off each side)

everyone loves pictures, picky time

parts layed out ready for assembly;
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Unread 09-01-2002, 01:51 AM   #22
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The reason I asked about this is because I had basically the same idea - I asked about a HS like this in the HS area, but no one knew of one It was either this or another solid block design I came up with.

I figured I'd have the barbs enter into a chamber that would feed into the fins. I'd put a knife edge on the ends of the fins to lessen restriction.

In my opinion, the pic with the fins on the sides cut off should work good for a block sitting on the CPU. I think you could use more/all of the fins if you were going to go with a Pelt setup.
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Unread 09-01-2002, 01:52 AM   #23
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block assembled and tied together with wire;
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Unread 09-01-2002, 01:53 AM   #24
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block after soldering, leak free first go
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Unread 09-01-2002, 01:57 AM   #25
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good vertical shot down the tubes showing the fins and spreading chamber inside.

A quick flow test with my 2800L/H pump through 1m of 3/4'' hose produced 1600L/H
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