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BladeRunner: I see what you mean about the mobo choice as it's more limited with dual CPU systems, It would still annoy me however, and it's beyond comprehension that some makers see fit to make newer single CPU boards without the holes, (unless of course they are indicating that they don't want the modders to buy their products)
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I agree it's annoying, but at least according to Tyan tech support, it appears that either AMD has removed the holes from the current design spec, or hadn't put them in as of when the board was first built. (And bear in mind that Tyan is the board co. selected to do the REFERENCE design for dual Athlon MP mobos, so they should know...)
Below is a partial quote from the response I got from Tyan when I asked about the holes...
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Tyan Tech Support: ... Only the S2462 has these holes designed around the sockets. All the other AMD products do not have these type of mounting holes available. At the point that these boards were designed AMD had no official design that incorporated mounting through the board itself. There are plenty of sources, including AMD's own, that will mount and work just fine without being mounted through the board itself.
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If this represents a new change in AMD design spec policy, it may bode ill for the modding community. OTOH, I'm not sure how we could fight it, somehow I have trouble visualizing the effect of a 'Save the Holes' campaign...
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Not sure what you are asking about the flow configuration, ...
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I was just wondering why you chose the distribution pattern you did, and gave some of the reasons I could think of. Your explanation was exactly what I was asking, and makes good sense.
Since I'll be doing at least some flow splitting as well, I was interested in your analysis. I'm going to have manifolds with loops running between them, as my CPU blocks will only have single in/out barbs.
Elsewhere I've been discussing flow patterns, and it appears to me that the best pattern will be to have two loops, one with the two CPU blocks in series using 1/2" barbs/tubing, and the second connecting all my small blocks (hard drives, possibly northbridge, etc.) with 1/4" or 3/8" tubing. That should keep the bulk of the water flow going through the CPU blocks, without excessive restriction.
The only real question was whether to have the CPU's in series or parrallel, but barring testing, I expect the series setup will work better from what the other thread was saying.
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... The inflow/ouflow tube I used is Tygon R-3603 which is 1/2" ID, that as I said is heat stretched, (boiling water immersion), over the 5/8" OD (1/2" ID barb), keeping the ID "pure" throughout. It really is best as 1/2" Tygon on a 1/2" barb is too loose IMO, and could present a leak / weep issue even with a clip. If I were using 1/2" OD barbs I would get 3/8" Tygon and do the same I guess. Tygon is thick walled and a brass barb wont cut through it even if the edge is sharp, this edge is what gives it good grip. If you intend to use socket clip retention I highly recommend Tygon tube, (or silicon, but you'd definately need good clips with silicon)
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Well, I'll check around to see if I can find a local Tygon source. Thanks for the spec. on the tube number, I'll have to mike out my barbs to see what their actual dimensions are, I'm pretty sure they're 1/2" OD, 3/8" ID though.
Gooserider