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post #39931 of 43971
Loop order doesn't matter. Temps will stabilize in no time. And water flows fast enough to be warmed up significantly from a component to the next.

It's all about ambient and rad space.
post #39932 of 43971
Quote:
Originally Posted by Arizonian View Post

When you get a chance please post proof (read OP for what is needed) and I'll get you added on the roster. Also for anyone else that hasn't posted proper proof and would like join the list, please do. smile.gif

Will do. thumb.gif Just got to wait for it to get here.

I'm only a few years late.. tongue.gif
post #39933 of 43971
My Sapphire stock 290 with EK waterblock and backplate: http://www.techpowerup.com/gpuz/details.php?id=4xq5x
I like to be on the list smile.gif
post #39934 of 43971
Quote:
Originally Posted by MEC-777 View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by xKrNMBoYx View Post



Loop is done and now leak testing. I initially had a problem where the fill port got loose in the beginning but after that I have not seen any leaks. Time to leave it on for 24 hours. Then I can connect everything and get to seeing temp changes from reference cooling.

Gooks great. thumb.gif

I've been thinking about doing a custom loop on my own setup with 290's in crossfire as well, but there's something I don't understand. After looking at a number of other people's loops and paying particular close attention to the order of the components in terms of water flow, I don't get why people often have all their system components - CPU, GPU(s) - flowing one after the other, especially when they have more than one rad in their system.

Looking at your system, for example - and please forgive me, this is just an observation - but the order of flow doesn't make sense to me and I don't think this would give you the best possible temps. It looks like you have things int he following order:

Res/Pump -> top rad -> front rad -> GPU -> GPU -> CPU -> rear rad -> res/pump.

Now, to me, I would think the water would be warmer right after going through both GPUs, and having that water go through the CPU right after would that not cause the CPU to run a little warmer? If you have multiple rads, my thinking is it would be best to have a rad between the CPU and GPU blocks and run the water through the CPU first as they generally produce a lot less heat than GPUs can.

Would this not a better order for water flow?

Res/pump -> CPU -> rear rad -> GPU -> GPU (with parallel flow between GPU blocks instead of single-line flow) -> front rad -> top rad -> res/pump.

My thoughts on this is to have the majority of the cooling done after the water flows through the components and before the pump (so the pump gets cooler water going through it) and to have one rad between the CPU and GPU(s) so the water is as cool as possible before going through each component.

Again, I'm not trying to pick apart your system at all, I think it's awesome! I'm just trying to understand why I've seen so many people who have the order components and flow of water in what I believe to be a less efficient and less optimal layout. Perhaps there's something I'm missing? Does what I'm saying make any sense?
Yes, you're missing thermodynamics theory. tongue.gif Like everyone else said, the gist is that the water begins to warm up slowly, and in time it reaches a balance, called an equilibrium. Heat is made and heat removed, the loop is stabilized and temperatures will not change. If you measure the temp between the radiator out temp & cpu out temp, the difference is only 2 to 3 degrees. This has been verified, not in theory. I have read the test but I don't think I bookmark it.
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post #39935 of 43971
I just made a small discovery with coil wine.

My 290x has not had coil whine that I have heard at all until today. I made a custom cooler for the VRM2 and screwed it on. It was then that I noticed significant coil wine while running heaven. I remembered that my old VRM2 cooler was contacting the choke which is just below the VRM2, I had used a thermal pad to stick to that choke to make it stick better previously.

When I installed the new cooler I did not do this. I took it back apart and this time put a small roll of thermal pad between the choke and the VRM cooler, then restarted and the coil whine was gone. Everyone knows that its the coils making the noise.

Just an idea but if some of you are getting coil whine, you could use some VRM pads and small ram sinks if you have them to tame the noise if it bothers you. It worked on mine.
     
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post #39936 of 43971
Quote:
Originally Posted by mus1mus View Post

Loop order doesn't matter. Temps will stabilize in no time. And water flows fast enough to be warmed up significantly from a component to the next.

It's all about ambient and rad space.
Quote:
Originally Posted by kizwan View Post

Yes, you're missing thermodynamics theory. tongue.gif Like everyone else said, the gist is that the water begins to warm up slowly, and in time it reaches a balance, called an equilibrium. Heat is made and heat removed, the loop is stabilized and temperatures will not change. If you measure the temp between the radiator out temp & cpu out temp, the difference is only 2 to 3 degrees. This has been verified, not in theory. I have read the test but I don't think I bookmark it.

Ah, thanks, understood. thumb.gif I've studied thermodynamics in school, so I know what you mean and what you're trying to explain. I guess I just never realized the delta-T in the actual temperature of the water itself is not that significant, so long as you have sufficient rad dissipation. In that case, yeah, I guess it really doesn't matter.

Still, to satisfy my OCD nature and get temps as low as possible, if I do end up building a custom loop for my system, I'll probably go with the following order: Res/pump > CPU > top 120mm rad > rear 120mm rad > GPU1 > GPU2 > front 240mm rad > Res/pump. wink.gif
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post #39937 of 43971
Quote:
Originally Posted by MEC-777 View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by mus1mus View Post

Loop order doesn't matter. Temps will stabilize in no time. And water flows fast enough to be warmed up significantly from a component to the next.

It's all about ambient and rad space.
Quote:
Originally Posted by kizwan View Post

Yes, you're missing thermodynamics theory. tongue.gif Like everyone else said, the gist is that the water begins to warm up slowly, and in time it reaches a balance, called an equilibrium. Heat is made and heat removed, the loop is stabilized and temperatures will not change. If you measure the temp between the radiator out temp & cpu out temp, the difference is only 2 to 3 degrees. This has been verified, not in theory. I have read the test but I don't think I bookmark it.

Ah, thanks, understood. thumb.gif I've studied thermodynamics in school, so I know what you mean and what you're trying to explain. I guess I just never realized the delta-T in the actual temperature of the water itself is not that significant, so long as you have sufficient rad dissipation. In that case, yeah, I guess it really doesn't matter.

Still, to satisfy my OCD nature and get temps as low as possible, if I do end up building a custom loop for my system, I'll probably go with the following order: Res/pump > CPU > top 120mm rad > rear 120mm rad > GPU1 > GPU2 > front 240mm rad > Res/pump. wink.gif
Why not! thumb.gif My loop order is res+pump >> cpu >> top 360 rad >> 290's >> bottom 120 rad >> front 240 rad >> res+pump. The loops that you saw cpu >> gpu probably have the top rad ports toward the front instead of at the back which I think the order is actually likely .... >> gpu >> cpu >> top rad >> res+pump >> (and the rest of the loop).

Yeah, I know, top rad is red but that was the only one available (in stock) that time. I was going to paint it but I didn't. tongue.gif
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post #39938 of 43971
Quote:
Originally Posted by kizwan View Post

Why not! thumb.gif My loop order is res+pump >> cpu >> top 360 rad >> 290's >> bottom 120 rad >> front 240 rad >> res+pump. The loops that you saw cpu >> gpu probably have the top rad ports toward the front instead of at the back which I think the order is actually likely .... >> gpu >> cpu >> top rad >> res+pump >> (and the rest of the loop).

Yeah, I know, top rad is red but that was the only one available (in stock) that time. I was going to paint it but I didn't. tongue.gifWarning: Spoiler! (Click to show)

Nice setup! Very clean. thumb.gif
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post #39939 of 43971
Does anyone know what the "ACP Application" is that is installed during the catalyst driver installation?
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post #39940 of 43971
Quote:
Originally Posted by MEC-777 View Post


Ah, thanks, understood. thumb.gif I've studied thermodynamics in school, so I know what you mean and what you're trying to explain. I guess I just never realized the delta-T in the actual temperature of the water itself is not that significant, so long as you have sufficient rad dissipation. In that case, yeah, I guess it really doesn't matter.

Still, to satisfy my OCD nature and get temps as low as possible, if I do end up building a custom loop for my system, I'll probably go with the following order: Res/pump > CPU > top 120mm rad > rear 120mm rad > GPU1 > GPU2 > front 240mm rad > Res/pump. wink.gif

Hey, to add to your OCD, configure your loop to be as clean as possible. thumb.gif

Loop order should be made to promote less or short tube runs as possible. Nothing scientific. Just clean runs. You will be satisfied.
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