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post #661 of 753
Quote:
Originally Posted by moonslug View Post
Another general question about block design. Why is it accepted that "little channels" of water transfer heat better than wider channels? Is it related to the turbulence of the water? I see the HK 3.0, reportedly best commercial CPU block design, uses those microchannels.
Right the more turbulent you can keep the water passage through your block the more heat it will pick up, the higher the flow the better.The more turbulent through your rad the more heat it will scrub off.

Some blocks are not as flow dependent as others but any will still pick up more heat with higher flow due to increased turbulence and a more rapid rate of travel around the loop.
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post #662 of 753
What do you guys think of this cpu block? I designed it a few years ago and I think I will attempt to make it. I am planning on changing the pins to channels, making a few different injector plates, and spacing the inlet and outlet for compression fittings.




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post #663 of 753
I never understood baseplates that seem omnidirectional with an outlet in one corner. What's promoting water flow in the other three corners? Seems one-tracked to me. At least with channels, it's directional. What am I missing?
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post #664 of 753
This is a 4890 WB idea that has been bumped around quite a bit, just need to shell out some money to get it all done.

I can't wait to get this milled


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post #665 of 753
Quote:
Originally Posted by moonslug View Post
Another general question about block design. Why is it accepted that "little channels" of water transfer heat better than wider channels? Is it related to the turbulence of the water? I see the HK 3.0, reportedly best commercial CPU block design, uses those microchannels.
One main reason for this is surface area contacted by the water volume. By having lots of fins you greatly increase contact for heat to be dispersed. If the channels are large then a large mass of water never transfers heat and that amount's potential heat dispersion is reduced.
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post #666 of 753
Quote:
Originally Posted by Bakedinspace View Post
One main reason for this is surface area contacted by the water volume. By having lots of fins you greatly increase contact for heat to be dispersed. If the channels are large then a large mass of water never transfers heat and that amount's potential heat dispersion is reduced.
Is there a thermal difference between these straight microchannels we see on CPU blocks like the HK 3.0 and the wavy channels we see on GPU blocks, like this 5870?

It would seem to me that "wavy" channels would create a bit more turbulence, but then again, the only physics class I've ever taken had to do with sound waves
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post #667 of 753
Quote:
Originally Posted by moonslug View Post
Is there a thermal difference between these straight microchannels we see on CPU blocks like the HK 3.0 and the wavy channels we see on GPU blocks, like this 5870?

It would seem to me that "wavy" channels would create a bit more turbulence, but then again, the only physics class I've ever taken had to do with sound waves
The waves will not make a positive difference at all, they are simply for looks. It could cause some pressure drops (extremely minimal) but it's not too degrading. It will not cause turbulence because of it's directed flow, unlike a CPU block that has a very random flow pattern.
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post #668 of 753

This thread is cursed.
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post #669 of 753
Quote:
Originally Posted by Bakedinspace View Post
The waves will not make a positive difference at all, they are simply for looks. It could cause some pressure drops (extremely minimal) but it's not too degrading. It will not cause turbulence because of it's directed flow, unlike a CPU block that has a very random flow pattern.
How could a random flow pattern work well though? The best CPU cooler, for example, has a directional flow pattern. A random pattern to me would seem to just promote water moving around randomly, not ensuring proper intake/outtake.
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post #670 of 753
Quote:
Originally Posted by bei fei View Post
What do you guys think of this cpu block? I designed it a few years ago and I think I will attempt to make it. I am planning on changing the pins to channels, making a few different injector plates, and spacing the inlet and outlet for compression fittings.




Doesn't look bad. It would keep your turbulence over the core. You might be able to route your water over the rest of your base a little more efficiently by having some drop down channels in the mid-spacer to the top of the pins.

Jets are fun to play around with to try different patterns......I use jet barb inlet blocks and had a lot of fun trying different shapes.
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