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Best performing D5 Top? - Page 2

post #11 of 40
That is not how flow rates work. I can't do it right now, but I'll draw up some calculations for you when I get home.
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post #12 of 40
Thread Starter 
Ok but what did I do wrong?
And please also pay a lot of attention to my Edit: of post #10 right now that is the most important question to me
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post #13 of 40
Quote:
Originally Posted by Kung Pow View Post
I did some calculations.

I wanna keep the pump slient so I intend to run it at speed setting 3 / 3300 rpm = 3 GPM with the EK X D5 Rev. 2 Top ....or max 4 /4050 GPM = 3.25 GPM with the EK X D5 Rev. 2 Top

1 GPM = 227 l/h (Just for comprehension matters)

My EK Supreme HF Full Nickel allows a flowrate of 1.59 GPM - 360 l/h.
My Phobya G Changer 360 allows a flowrate of 1.98 GPM - 449 l/h.
My EK Waterblocks GPU Block allows a flowrate of 1.75 GPM - 398 l/h.
My Phoba Xtreme 1080 Rad allows a flowrate of 1.69 GPM - 384 l/h.

The average flow of 1 x D5 with EK X Top Rev. 2 should be 1.75 GPM in my system.
Two would approximately result in 3.5 GPM -/+ 0.5GPM .

If I calculated right these are the end results

Edit: Charlie I do not understand why you said the Kryos would be too restrictive for my system and my temps would get high? Even with the 1.25GPM the Kryos grants my average would still be over 1 GPM easily. So what benefit do I know have from switching it with the EK Supreme HF Nickel?
That's not how you calculate flow rate. You have to make an estimate of the pressure/flow curve for your components, and then place it onto the pump's power. Since this is very hard, it is best to just check whether you will get over or under a particular flow rate. I will use the flow rate of 1 GPM as it is generally seen as the flow rate where temperature gains begin to become minimal.

Step 1) Find out how powerful the pump is at that flow rate

I looked to Skinnee Lab's testing of the Laing D5 and found this graph for setting 3:



The Laing D5 with the EK X-Top has 2.25 PSI of head pressure at 1.0 GPM. Since you are using two pumps, double the number to 4.5 PSI.

Now, let's add up the total restriction of these components:

Your radiator pressure drop data was also done by Skinnee Labs.

So, we are at 0.38 PSI at 1.0 GPM of flow.

Now for the GPU block. While I don't have any exact data on the EK Waterblocks GTX 295 block, all other reviews of EK GPU blocks have had 0.8-1.0 PSI of drop at 1.0 GPM of flow. Let's take the higher end estimate to be safe. Add that to the total and we are up to 1.38 PSI total drop.

I also have no data for the CPU block, but based on some rough calculations based on a few reviews it should be around 1.6 PSI at 1.0 GPM

Total is now 2.98 PSI.

Add in the 1080 Radiator. I will simply assume it is 3x the restriction of the magicool 360 (as that's what the radiator seems to be, 3 360 radiators in serial) 1.14 PSI drop. Total is now 4.12 PSI. That leaves 0.38 PSI of headroom for fittings and tubing. I'd say with that setup you'd be getting just over 1 GPM.

Now, with the Kyros XT, which has roughly 2.5 PSI of drop at 1 GPM, that figure would be increased to 5.02 PSI. Thus you would be forced to turn the pumps up to setting 4.


Now that we have gotten all of that out of the way, I would suggest that you do NOT get dual MCP655s. With the cost of the dual top and the two pumps it would be a better idea to get a single MCP35X and use the PWM control on the motherboard to keep it nice and quiet.
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post #14 of 40
Thread Starter 
First off all thank you for the effort I really appreciate it

Secondly, I will sell both of my GTX 295.
A friend gave me one of is GTX 580 with an EK Water Blocks EK-FC580 GTX.
I might get another one and SLI them since I already have one...not sure though

Considering this change would drop the PSI requirements a little I hope.

Also, regarding my pump I will definitely not buy another D5 in order to do a dual combo.
Right now these are the pumps available in my country:http://www.aquatuning.at/index.php/language/en/cPath/27

The X35 is not among them I would have to order it from UK.
I hope you can find a usefull one in the link otherwise I will have to orther from either USA or UK.
Another forum advised me to just install a MCP 355 right after the D5...would that add some performance?
Edited by Kung Pow - 2/23/11 at 11:37am
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post #15 of 40
The EK 580 Block has 0.87 PSI of pressure drop.

For the pump I would get this one:

http://www.aquatuning.at/product_inf...Plexi-Top.html

That single pump by itself will be more than you need. If you need silence you can always hook it up to a fan controller.
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post #16 of 40
Thread Starter 
According to your calculations with the 580 WB I would need 3.99PSI let´s round it up 4.00 PSI ...so the D5 with EK top only provides 2.25 if that is the case I will need the Laing DDC.

Because already have a D5 so I might as well use it.
The MCP 355 is the same as the Laing DDC 1T just rebranded I think.

Also would it be possible to run both the D5 and Laing DDC in one loop?
If yes would that provide better headpressure because of the laing additionally better flowrates cause of the D5? And would that result beat a Dual D5 combo?

If it is possible and a performance gain. ..what would be the best way to do it?..Does the order the pumps would be placed matter?
I was thinking res->D5 with EK top->1080rad->EK Supreme->Laing DDC->360 Phobya rad->580 EK Block->Res

And if that D5-Laing DDC combo theory works and it would really yield better performance and head pressure than a D5 combo......then the Kryos would not impose a problem would it?
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post #17 of 40
You should not mix and match pumps. They will be pushing/pulling water at different rates and at different pressures so you will wear them out *much* faster. Stick with just one pump type in the loop.
 
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post #18 of 40
the real question is what are you going to be pushing that you need a better top
cpu only loop DONT need it
CPU motherboard DONT need it

start add graphics cards and multiple rads then yea you need it

I use the xspc 655 pump/res combo
nice, clean and simple
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post #19 of 40
my mcp655-b in a xspc bay res is working great with a rasa cpu block and ek 5870 block with a rx360 in top of my case and rx240 in the bottom with 4-5 feet of tubing.
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post #20 of 40
Thread Starter 
Quote:
Originally Posted by charliehorse55 View Post
That's not how you calculate flow rate. You have to make an estimate of the pressure/flow curve for your components, and then place it onto the pump's power. Since this is very hard, it is best to just check whether you will get over or under a particular flow rate. I will use the flow rate of 1 GPM as it is generally seen as the flow rate where temperature gains begin to become minimal.

Step 1) Find out how powerful the pump is at that flow rate

I looked to Skinnee Lab's testing of the Laing D5 and found this graph for setting 3:



The Laing D5 with the EK X-Top has 2.25 PSI of head pressure at 1.0 GPM. Since you are using two pumps, double the number to 4.5 PSI.

Now, let's add up the total restriction of these components:

Your radiator pressure drop data was also done by Skinnee Labs.

So, we are at 0.38 PSI at 1.0 GPM of flow.

Now for the GPU block. While I don't have any exact data on the EK Waterblocks GTX 295 block, all other reviews of EK GPU blocks have had 0.8-1.0 PSI of drop at 1.0 GPM of flow. Let's take the higher end estimate to be safe. Add that to the total and we are up to 1.38 PSI total drop.

I also have no data for the CPU block, but based on some rough calculations based on a few reviews it should be around 1.6 PSI at 1.0 GPM

Total is now 2.98 PSI.

Add in the 1080 Radiator. I will simply assume it is 3x the restriction of the magicool 360 (as that's what the radiator seems to be, 3 360 radiators in serial) 1.14 PSI drop. Total is now 4.12 PSI. That leaves 0.38 PSI of headroom for fittings and tubing. I'd say with that setup you'd be getting just over 1 GPM.

Now, with the Kyros XT, which has roughly 2.5 PSI of drop at 1 GPM, that figure would be increased to 5.02 PSI. Thus you would be forced to turn the pumps up to setting 4.


Now that we have gotten all of that out of the way, I would suggest that you do NOT get dual MCP655s. With the cost of the dual top and the two pumps it would be a better idea to get a single MCP35X and use the PWM control on the motherboard to keep it nice and quiet.

Due to charliehorse555 calculations my parts will require the following pumppressure to maintain a flowrate of 1 GPM:
My MCP655 with the EK X D5 Rev 2 Top (best performing D5 Top)would provide 2.25PSI

Phobya Xtreme 1080 rad=>1.14PSI
EK Supreme HF Full Nickel=>1.6PSI
Phobya G Changer 1.2 =>0.38PSI
EK Water Blocks EK-FC580 GTX=>0.87PSI

The summed up PSI of all components would be 3.99PSI

1.74PSI are still lacking. ..I hope these are accurate values.
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