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Any OC.com Member make waterblocks?

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Actually, I plan on bead blasting the entire inside when I'm finished, to give it a rough surface. Ferric Chloride, used to etch circuit cards would work, but I'm fresh out. :D

Hoot
 
It's was pre-production sample of an air cooled heatsink that may or may not wind up being introduced into the market. Look how long people have been waiting for the SLK-600. I believe there are other short pin based copper heatsinks out there though. I seem to recall seeing one or two for some obscure CPU, who's designator eludes me, but it had a U in it.

Hoot
 
Hoot said:
That base and pins are forged from one piece of copper. No drill and stake. It's a modified air cooled heatsink. The pins were originally about 1-1/2 long. Using a 3/8" long piece of small steel tubing as a gauge, I slid it over each individual pin and snipped it off with a pair of sharp, fine dikes so that they all are exactly 3/8" long.

It was quite the labor of love. I guess I've read one too many posts about water sinks as opposed to water blocks and they got me to thinking.

Hoot

Looks like you made a total of 225 snips :eek:

Its a good thing you weren't making it with a dense pin Alpha, or you'd stil be snippin :temper:
 
I can, to a minor degree. I lack alot of the tools needed for most. I have made 1 complete so far.
SilverBell
There is the one that I have made and completed, tested for leaks, but not quite yet for effeciency, that is soon to come.
 
I checked out Alpha's website and took a look at their High Density Fin heatsinks... The ones with the pins... Those look tasty... I sent an email to Alpha asking if they make a HS like that in copper though. I would assume it wouldn't be hard since I am sure they have the molds for it. Anyway, my question is this:

Once I get the copper heatsink, would it be wise to use some sort of a saw to cut the pins down to a standard size? or am I going to have to clip them with some sort of clippers?

And once the pins are short enough, would I be able to use a saw to cut lengthwise to make room for the channels of the waterblock that I am going to fit over it? If so, what would the minimum blade thickness be that I could use? Any recommendations are welcome.

That's it for now. I'll think of something later.
 
Oh and another question I need answered is if I want to cut the base of a heatsink down, is it safe to actually cut it with something or should I just keep sanding it down with rough paper and then smooth it out? Thanx.
 
Ok so alpha doesn't make any more copper heatsinks because of the short "tooling" life... what ever that means. So now my question is this: Water absorbs heat faster from aluminum right? Copper is just better at spreading it out. So for this application of a waterblock/heatsink Aluminum would be the better choice. And if I needed the heat to be spread out for whatever reason, I could just use a copper or silver coldplate. Am I correct?
 
The copper/aluminium debate has been raging for some time, with no clear winner as far as i know. The difference is very slight, in both spreading and radiation. Doing a bi-metal block to take advantage of the benefits of each material is notoriously hard, simply because of the inefficiency of the join between the 2 metals.

I think Hoot made his from copper because the heatsink he modified was copper in the first place. If it was aluminium, he's still have done it i guess, and the difference wouldn't be too severe.

Its also best to use the same material for the block as you do for the radiator, due to the battery effect, this is lessened by waterwetter, obviously, but its better to just stick to the same materials from the get go, if you can.

These are some great design ideas guys, keep it going.

I remember something similar to this was done with an old heatsink with clear lexan sides. looked cool too, with dyelite in the water. :)
 
Just an update on my progress so far. I had some spare time today, so I got some of the sub-components done. I'm still pondering on the top cover though. The brass strap stock that I bent to make the outer wall is too thin to screw into or glue onto, so I'll probably go with a piece of plate stock for the top cover. I'm also still pondering a hold-down method. More as time permits.

Hoot

parts.jpg
 
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Put together, it looks like this. Water flow is the blue shading. Circles denote where the 1/2" barbs will be.

Hoot

topassy.jpg
 
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Looks excellent Hoot... I just emailed a company that makes molds and casts silver for jewlers and such. Hopefull they will be able to make a mold and cast the heatsink I want in silver. I'll keep you posted on the reply.

What is really eating away at me is whether my additional 500 pins in my heatsink and the fact that it is silver is going to make any difference, and if so how much? lol time will tell I guess.
 
hoot that is NICE!!!!!!!!!!!!!!!!!!! are you gonna plextop that???? that would be cool but how would you seal it????
 
make the top 4 hole mounting!!! for the top dont use 2x2 use 2x3 and do the 4 holes.... thats your best bet, and the brass thing around it just soldier that in, itll work
 
I think there is a point of diminishing returns on pin count. I actually wish this base I'm using had less of them. I think the more pins you have, the shorter they should be. I chose 3/8" height so they would just reach the cover plate. That way, water would not take the path of least resistance and flow across the upper part of the inside area, thus skipping a lot of the pin and baseplate exposure. Part of me still says to cut the pins down further, having them only about 1/8-1/4" high. I don't think that much heat will rise up the top of tall pins for the water to wick away.

Hoot
 
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