General OpenPOWER Hardware > General CPU Discussion
POWER9 water cooling kit
vikings.thum:
--- Quote from: ClassicHasClass on June 22, 2021, 12:56:29 pm ---Nice temperature reduction! I'm pretty confident all those problems are solvable.
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I'm pretty confident as well, the manufacturer has been helpful so far.
--- Quote from: ClassicHasClass on June 22, 2021, 01:07:17 pm ---Also, what fluid did you use?
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We use DM or osmosis water (better avoid distilled water from the supermarket, it's often a bit on the acidic side) and a glycol without additives somewhere around a ratio of 1:20 (or even less), I've never ran into problems with that but this also depends on what tubing you use (PVC tubing can be problematic with very high glycol contents). There are also ready-to-use solutions available for PC watercooling enthusiasts, AFAIK most of those also use glycol/water but are more expensive, some contain glutaral (even though very little) which I would be a bit scared of to be honest. Correct me if I'm wrong :)
Cooling solutions that contains glycol must be disposed of properly. In Germany for example municipalities accept it free of charge as hazardous waste in small quantities.
vikings.thum:
Glide, O sparkling waves and murmur softly...
We now have a second revision of our improvized mounting mechanism in place, made of stainless steel and a couple of other small improvements. The mounting mechanism is in production and will be available in approx. 2 to 4 weeks together with a water cooling kit for all RaptorCS mainboards. We'll also make it available with just the cooler (because the mechanism is made for a specific cooler), just in case people want to use existing pumps/radiators.
I'll send another update here once we have them in stock.
ClassicHasClass:
Are you planning to sell fluid as well, or if not, what's your specific recommendation? How good is the mounting pressure on these?
vikings.thum:
--- Quote from: ClassicHasClass on October 19, 2021, 04:33:15 pm ---Are you planning to sell fluid as well, or if not,
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Yes, though it should be pretty easy to make a solution yourself.
--- Quote from: ClassicHasClass on October 19, 2021, 04:33:15 pm ---what's your specific recommendation?
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Please see reply #20 from a while ago above, perhaps you've missed that.
--- Quote from: ClassicHasClass on October 19, 2021, 04:33:15 pm ---How good is the mounting pressure on these?
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Hand-tight.
We try to prevent over-tightening by choosing a short screw correspondingly, so that it shouldn't be possible to tighten it too much. The mounting mechanism is somewhat improvised to be low-cost, so high pressure, e.g. with IBM's 90kg high-pressure system, would bend the mechanism and probably destroy the water cooler as well.
ClassicHasClass:
No, I saw that; just checking it didn't change. Thanks!
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