[Hexus] JetCool CPU Waterblocks 10x Better at Heat Transfer - Page 3 - Overclock.net - An Overclocking Community

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[Hexus] JetCool CPU Waterblocks 10x Better at Heat Transfer

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post #21 of 43 (permalink) Old 07-12-2019, 05:06 AM
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So will this technology get picked up by the pick PC water-cooling manufacturers or is this patented by JetCool and will only be sold for commercial applications?
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post #22 of 43 (permalink) Old 07-12-2019, 05:09 AM
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IBM did direct die but milled microchannels in die to improve surface area (mandatory for high power density/ie high watts low surface area), and decided it wasnt cost efficient at low watts and not feasible at higher power density.

Others have done direct die on xtremesystems using jet nozzles hitting die, always ended up with much worse temps vs normal water block with channels to allow enough surface area where water with its very poor heat conductance can transmit heat. You would need to make micropins or channel into die for surface area. But really what you need is liquid metal being pumped to do direct die. Water at 0.6 w/mk isnt going to cut it without massive surface area unless it is very low power density. liquid metal at 40 w/mk would work with direct die and high power density (its been done before as well just not commercially feasible)

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post #23 of 43 (permalink) Old 07-12-2019, 05:16 AM
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So basically back to the original Swiftech Storm.

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post #24 of 43 (permalink) Old 07-12-2019, 06:59 AM
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Quote: Originally Posted by DNMock View Post
Isn't heat transfer coefficient usually expressed in Kelvin?
It doesn't matter in this case. Since they are dividing by temperature, and Kelvin and Celsius have the same magnitude. (i.e. 27 deg C = 300 K, 47 deg C = 320 K; both are 20 units apart.)
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post #25 of 43 (permalink) Old 07-12-2019, 02:11 PM
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Quote: Originally Posted by DNMock View Post
Isn't heat transfer coefficient usually expressed in Kelvin?
Usually in Watts per Meter-Kelvin or W/mK.
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post #26 of 43 (permalink) Old 07-12-2019, 04:16 PM
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The more I think about this, the less sold on the concept I am. Sure direct die's better, whatever, but I can't figure out how this "jet cooling" will be any better. To achieve higer flow velocity in their water block they must be restricting the flow, so I just cannot imagine how higher flow rates vs slower but more liquid produces significanty better results. I'm also pretty suss on water achieving a transfer coefficient of 500,000 w/m2 K. It's been a while since I've done physics so I'm not going to math it out, but nothings really adding up for me here.
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post #27 of 43 (permalink) Old 07-12-2019, 04:24 PM
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Too risky for regular folk. A bad seal will cause...trouble.
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post #28 of 43 (permalink) Old 07-12-2019, 04:47 PM
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Quote: Originally Posted by StAndrew View Post
So basically back to the original Swiftech Storm.
Now that's a name I haven't heard in a long time. Remember the Storm G5 made out of silver - or the original pre-swiftech "Cathar" Storm blocks. How about all of the custom builds using Laing DDCs and the giant Eheim pumps. Those were the days!
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post #29 of 43 (permalink) Old 07-12-2019, 05:08 PM
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Quote: Originally Posted by AmericanLoco View Post
Now that's a name I haven't heard in a long time. Remember the Storm G5 made out of silver - or the original pre-swiftech "Cathar" Storm blocks. How about all of the custom builds using Laing DDCs and the giant Eheim pumps. Those were the days!


Cathar!! That was the name of those blocks. I was racking my brain trying to remember what they were called. The old days when a single person made the best waterblock by far. I sure don’t miss the limited production runs and shipping from Australia. I wish I kept my old block.

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post #30 of 43 (permalink) Old 07-13-2019, 07:42 AM
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Quote: Originally Posted by Drewminus View Post
The more I think about this, the less sold on the concept I am. Sure direct die's better, whatever, but I can't figure out how this "jet cooling" will be any better. To achieve higer flow velocity in their water block they must be restricting the flow, so I just cannot imagine how higher flow rates vs slower but more liquid produces significanty better results. I'm also pretty suss on water achieving a transfer coefficient of 500,000 w/m2 K. It's been a while since I've done physics so I'm not going to math it out, but nothings really adding up for me here.
Sure it can... if your unit of time is per week or something...


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