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post #621 of 753
Like this?



I'm leaning towards silver soldering the brass and copper pieces together as I doubt my ability to get an o-ring sized properly and the block is quite small. Is this a dumb idea? I realize I lose the ability to clean out the block if problems arise.
post #622 of 753
i'd just go out and check what sized o-rings are common... then create the channel it goes in accordingly... it doesnt need to be accurate to the single mm, the things can stretch a little. so slightly too small is ok.
post #623 of 753
Ok I'll give it a go. I'll need to revise so that the mounting screws don't come all the way through. Back to sketch-up...

Thanks very much for the help BTW.
post #624 of 753
how do you plan to make it?
post #625 of 753
can you make your gpu pins smaller but more of them? The more surface area the better heat transfer. But definitely get generic o-rings that can easily be bought from a hardware store.
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post #626 of 753
Looks like the inlet/outlet of the block is same height as the vid card itself. Think that would make it very difficult to do SLI.

I'm going by this for making the grooves for o-rings



basically @70% of o-ring diameter for depth and @1.2% for width so that when the top compresses down on the o-ring material, it'll have enough height to form the seal and enough channel width to expand out into once compressed...otherwise you get a gap.

Mcmaster-carr and other places sell o-ring cord stock, which is just a spool of o-ring in whatever diameter, durometer and tpe you choose. I think we use pretty soft material for watercooling, so probably 50 for hardness ( I think the one n my kit is 70...which will take more pressure to compress)...but I am just guessing. I went with a "make your own o-ring" kit, which was just a jig, a razor blade, super glue and some o-ring cords. The jig may prove useful for making straight cuts, but other then that, probably better off buying just the spool of o-ring and super glue at a store.

I would have no problems using a self made glued together o-ring for a block to compress down on for the seal, but I would not use it for barbs..cause it twist down as it compresses
Edited by Herc130 - 8/2/09 at 1:27pm
post #627 of 753
Quote:
Originally Posted by Herc130 View Post
Looks like the inlet/outlet of the block is same height as the vid card itself. Think that would make it very difficult to do SLI.

I'm going by this for making the grooves for o-rings



basically @70% of o-ring diameter for depth and @1.2% for width so that when the top compresses down on the o-ring material, it'll have enough height to form the seal and enough channel width to expand out into once compressed...otherwise you get a gap.

Mcmaster-carr and other places sell o-ring cord stock, which is just a spool of o-ring in whatever diameter, durometer and tpe you choose. I think we use pretty soft material for watercooling, so probably 50 for hardness ( I think the one n my kit is 70...which will take more pressure to compress)...but I am just guessing. I went with a "make your own o-ring" kit, which was just a jig, a razor blade, super glue and some o-ring cords. The jig may prove useful for making straight cuts, but other then that, probably better off buying just the spool of o-ring and super glue at a store.

I would have no problems using a self made glued together o-ring for a block to compress down on for the seal, but I would not use it for barbs..cause it twist down as it compresses
awesome post... its been a while since i learned this much.
post #628 of 753
Quote:
how do you plan to make it?
Not sure what tools they'll use. Once the drawing is good enough, I'll take it back to them (the machinists) to tell me what's possible...I'm assuming CNC. I was originally planning planning on cutting it out in a layer cake approach using the laser cutter for the brass and hand tools for the copper. They thought that was pretty funny.

Quote:
can you make your gpu pins smaller but more of them
Possibly, it'll depend on what they can mill. I'm trying to keep it simple as they're doing it as a favor. On the o-ring, thanks, I'll see what I can find locally that's ready made.

Quote:
Think that would make it very difficult to do SLI.
Not a big problem as this is going in a very small case that I'm currently doing sketch-up tubing origami on to get everything to fit (see elbow hell below).

Thank you for the details on the custom o-rings and the o-ring sizing. That is exactly what I needed.

post #629 of 753


Looks like you have the GPU waterblock mounted on the backside/wrongside of the vid card.


zotac 9300? Using that for my itx water build.
Edited by Herc130 - 8/2/09 at 3:45pm
post #630 of 753
Good eye, it'll be remoted using a flexible PCI-E extender and mounted upside down. Necessary for space and to exit the cables through the base of the case.

Yes its the 9300. Nice little board. Do you have a worklog up yet?
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