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question about this pump Danger Den CPX Pro

post #1 of 9
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I got question about this pump Danger Den CPX Pro, bought this with a EK bay Reservoir for 55bucks and I think thats pretty good considering that the Reservoir wasn't used and if bought as new it would cost 65bucks w/o shipping.

Anyways my main question is would the pump be enough to pump thru these components?

Radiator 1: XSPC AX240
Radiator 2: EK Coolstream XT 240
CPU Block: EK Supremacy
GPU BLock: EK FC7970 Copper+Acetal



And I was thinking of adding one more radiator at the back exhaust, it will either be a EK XT Coolstream 120 or a XSPC RX120.


Tubing that I will use is the Rigid Tubing from Primochill which is 1/2 ID, and I will try to do the bends as forgiving as possible to lessen the pressure.


I couldn't quite comprehend the math on martinsliquidlab.org pressure chart (I suck at math LOL), in my estimation these blocks/rads would have atleast 2.98PSI pressure just wondering how much flow rate would I have with all these blocks with this pump and would it be more than enough for this kind of loop, I really don't wanna buy another pump would love to use what I already have now.
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post #2 of 9
The pump is the same as the EK-DCP 4.0, which isn't a bad pump. Not quite as good as a performer as a DDC or a D5 but it will still be sufficient for a loop like that.
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post #3 of 9
Quote:
Originally Posted by Sazz View Post

I got question about this pump Danger Den CPX Pro, bought this with a EK bay Reservoir for 55bucks and I think thats pretty good considering that the Reservoir wasn't used and if bought as new it would cost 65bucks w/o shipping.

Anyways my main question is would the pump be enough to pump thru these components?

Radiator 1: XSPC AX240
Radiator 2: EK Coolstream XT 240
CPU Block: EK Supremacy
GPU BLock: EK FC7970 Copper+Acetal



And I was thinking of adding one more radiator at the back exhaust, it will either be a EK XT Coolstream 120 or a XSPC RX120.


Tubing that I will use is the Rigid Tubing from Primochill which is 1/2 ID, and I will try to do the bends as forgiving as possible to lessen the pressure.


I couldn't quite comprehend the math on martinsliquidlab.org pressure chart (I suck at math LOL), in my estimation these blocks/rads would have atleast 2.98PSI pressure just wondering how much flow rate would I have with all these blocks with this pump and would it be more than enough for this kind of loop, I really don't wanna buy another pump would love to use what I already have now.

Is it the Danger Den CPX-1 or the Danger Den CPX Pro? Depending on your response there could be very different answers.

The Danger Den CPX-1 has about 2.55PSI at 1GPM, while the DD CPX-Pro has 3.83PSI at 1GPM.

The CPU block probably has about 1.5PSI pressure drop, and the GPU block probably has somewhere between .6PSI - 1.PSI at 1GM.

Now factor in tubing, and radiator resistance (usually about .2 PSI per rad, and .2 PSI per meter of tubing) and lets assume you now have around .5PSI more.

You have about a 2PSI - 2.5PSI drop. With the DD CPX1 you would have just over 1GPM if the pump is running at 100% (I'm not sure if it's adjustable.) With a DD CPX-Pro you would have some wiggle room to run your pump at a lower setting for quiet operation. (Assuming it's adjustable, I'm unsure as I don't have any DD products.)

So... both pumps would work, but you'd be pushing it with the CPX-1.
Quote:
Originally Posted by lowfat View Post

The pump is the same as the EK-DCP 4.0, which isn't a bad pump. Not quite as good as a performer as a DDC or a D5 but it will still be sufficient for a loop like that.





That depends on which DD pump we're talking about... The EK2.2 and DD CPX1 are both just rebranded Jingway 600s, and EK 4.0 and DD CPX-Pro are just both rebranded Jingway 1200s.
Edited by ZytheEKS - 8/12/13 at 8:44pm
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post #4 of 9
Thread Starter 
Quote:
Originally Posted by ZytheEKS View Post

Is it the Danger Den CPX-1 or the Danger Den CPX Pro? Depending on your response there could be very different answers.

The Danger Den CPX-1 has about 2.55PSI at 1GPM, while the DD CPX-Pro has 3.83PSI at 1GPM.

The CPU block probably has about 1.5PSI pressure drop, and the GPU block probably has somewhere between .6PSI - 1.PSI at 1GM.

Now factor in tubing, and radiator resistance (usually about .2 PSI per rad, and .2 PSI per meter of tubing) and lets assume you now have around .5PSI more.

You have about a 2PSI - 2.5PSI drop. With the DD CPX1 you would have just over 1GPM if the pump is running at 100% (I'm not sure if it's adjustable.) With a DD CPX-Pro you would have some wiggle room to run your pump at a lower setting for quiet operation. (Assuming it's adjustable, I'm unsure as I don't have any DD products.)

So... both pumps would work, but you'd be pushing it with the CPX-1.




That depends on which DD pump we're talking about... The EK2.2 and DD CPX1 are both just rebranded Jingway 600s, and EK 4.0 and DD CPX-Pro are just both rebranded Jingway 1200s.


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post #5 of 9
Quote:
Originally Posted by Sazz View Post

CPX Pro

It should be sufficient, then. You could probably even add another high restriction block to it, before flowrates are in danger.
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post #6 of 9
Thread Starter 
Quote:
Originally Posted by ZytheEKS View Post

It should be sufficient, then. You could probably even add another high restriction block to it, before flowrates are in danger.

So 3 rads (two 240 and one 120) +CPU Block + GPU Block is still good to go?

what if I add another GPU Block? lol just in case I do crossfire xD
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post #7 of 9
Quote:
Originally Posted by Sazz View Post

So 3 rads (two 240 and one 120) +CPU Block + GPU Block is still good to go?

what if I add another GPU Block? lol just in case I do crossfire xD

Well.. What kind of flowrates do you want. and will you run the graphics cards waterblocks in parallel or in series? As you increase the flowrate, the device becomes more restrictive, as with any component. The same goes for lowering the flowrate, pressure drop decreases as flow rate decreases. If you run your video cards in parallel not only is the pressure drop halved, but the flowrate is halved. The pressure drop to flowrate on graphics cards are almost never liner at any point in the graph. That being said usually if you run them in parallel you will have around 1/4 the pressure drop you would if you ran them in series. You will also have half the flowrate... Now MOST full coverage blocks have been optimized for low flow usage as the manufacturers of the waterblocks realize people often run their cards in parallel. You /usually/ only need about .4GPM to keep a full coverage waterblock sufficiently cooled, as opposed to the minimum of CPU blocks which is USUALLY around .7GPM.

I can't find a pressure drop graph of the EK FC7970, so I don't know what it's pressure drop is like. Let's assume worst case scenario, and it's high restriction like the Swiftech Komodo which has 1.5PSI drop at 1GPM.

So most rads have a very low pressure drop. Usually around .2psi pressure drop at 1GPM, unless it's a ridiculously restrictive radiator which DO exist. An example would be the GT Extreme, which has around a .8psi drop at 1GPM, and Swiftech rads which has around a .6psi drop at 1GPM. The GT stealth is also ridiculously restrictive, but I can't find a graph with it's PSI drop atm.

Tubing usually has around .2psi drop per meter of tubing at 1gpm.

So tubing and radiator will have around a .6psi pressure drop, or perhaps somewhere around .7

The EK supremacy has around 1.5PSi pressure drop at 1gpm if I remember correctly.

We now have about 2.2 PSI of a pressure drop at 1GPM.

So if you plan to try and push a heavy overclock on your video cards, then you'll want to run them in series. If not, you can run them in parallel.

If you were to run them in parallel, you could get away with the pump you are using right now.

If you run them in series, you will probably want to get a second pump, or upgrade yours...
You would probably be able to get away with running them in series on your current pump, but I can't find the exact pressure drop graph of the EK FC7970 right now so don't quote me on that.
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by ZytheEKS View Post

Well.. What kind of flowrates do you want. and will you run the graphics cards waterblocks in parallel or in series? As you increase the flowrate, the device becomes more restrictive, as with any component. The same goes for lowering the flowrate, pressure drop decreases as flow rate decreases. If you run your video cards in parallel not only is the pressure drop halved, but the flowrate is halved. The pressure drop to flowrate on graphics cards are almost never liner at any point in the graph. That being said usually if you run them in parallel you will have around 1/4 the pressure drop you would if you ran them in series. You will also have half the flowrate... Now MOST full coverage blocks have been optimized for low flow usage as the manufacturers of the waterblocks realize people often run their cards in parallel. You /usually/ only need about .4GPM to keep a full coverage waterblock sufficiently cooled, as opposed to the minimum of CPU blocks which is USUALLY around .7GPM.

I can't find a pressure drop graph of the EK FC7970, so I don't know what it's pressure drop is like. Let's assume worst case scenario, and it's high restriction like the Swiftech Komodo which has 1.5PSI drop at 1GPM.

So most rads have a very low pressure drop. Usually around .2psi pressure drop at 1GPM, unless it's a ridiculously restrictive radiator which DO exist. An example would be the GT Extreme, which has around a .8psi drop at 1GPM, and Swiftech rads which has around a .6psi drop at 1GPM. The GT stealth is also ridiculously restrictive, but I can't find a graph with it's PSI drop atm.

Tubing usually has around .2psi drop per meter of tubing at 1gpm.

So tubing and radiator will have around a .6psi pressure drop, or perhaps somewhere around .7

The EK supremacy has around 1.5PSi pressure drop at 1gpm if I remember correctly.

We now have about 2.2 PSI of a pressure drop at 1GPM.

So if you plan to try and push a heavy overclock on your video cards, then you'll want to run them in series. If not, you can run them in parallel.

If you were to run them in parallel, you could get away with the pump you are using right now.

If you run them in series, you will probably want to get a second pump, or upgrade yours...
You would probably be able to get away with running them in series on your current pump, but I can't find the exact pressure drop graph of the EK FC7970 right now so don't quote me on that.


But if I do add another Danger Den CPX Pro pump (a.k.a. Jingway DP1200) things should be good right?

And which way do you think is better, upgrading the pump to another single pump (Maybe a D5 pump or MCP35x, but I don;t like the MCP35x I've seen a lot of people having it fail on them.. and I mean a LOT xD)


Which one would a better choice, another DP1200 or a single D5?

And I'd run them in prallel if I ever do get another 7970 and block for it.


And lets say with single pump that I have and its getting 1gpm with the current set-up that I am planning (EK Supremacy CPU Block, EK FC 7970 GPU block, XSPC AX240 Radiator and EK XT Coolstream 240 Radiator) what and how much difference would it be having the flow rate run at 1gpm vs 1.5 to 2gpm? in terms of temps.
Edited by Sazz - 8/12/13 at 10:25pm
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post #9 of 9
Quote:
Originally Posted by Sazz View Post

But if I do add another Danger Den CPX Pro pump (a.k.a. Jingway DP1200) things should be good right?

And which way do you think is better, upgrading the pump to another single pump (Maybe a D5 pump or MCP35x, but I don;t like the MCP35x I've seen a lot of people having it fail on them.. and I mean a LOT xD)


Which one would a better choice, another DP1200 or a single D5?

And I'd run them in prallel if I ever do get another 7970 and block for it.


And lets say with single pump that I have and its getting 1gpm with the current set-up that I am planning (EK Supremacy CPU Block, EK FC 7970 GPU block, XSPC AX240 Radiator and EK XT Coolstream 240 Radiator) what and how much difference would it be having the flow rate run at 1gpm vs 1.5 to 2gpm? in terms of temps.

The DD CPX-Pro has 3.5GPM max flowrate correct? You could add almost any pump to that and not have issues. When using multiple pumps, if one pump has a max flow lower than that of your loops flowrate, then it adds resistance to the loop. If the pump you are adding(at the given setting you are using it at) has a flowrate greater than, or equal too, the current flowrate of your loop it will only increase performance.

An example: You are using a Alphacool DC-LT bulk pump, which has a max flow of about .6GPM, and you add a D5 pump at a setting where you will have 1GPM. Then, since the max flow of the Alphacool DC-LT is lower than that of your loops flowrate, it will only add restriction.

Now for an example of the opposite: If you have an EK DCP 4.0 (or in your case the DD CPX-Pro, it's the exact same pump as previously stated in this thread) and your loop is only flowing at, lets say .7GPM due to restriction, then you decide to add a D5 or a DDC3.2 (MCP355/MCP35x) Your loop is now flowing at 1.5 gallons per minute. The DCP is capable of producing more flow than that, so it would only increase performance.


So to answer your question, you could add ANOTHER pump to your loop, and not have compatibility issues. There would be little to no point in taking your pump out of your loop, if you decide to add another. In fact, it would be beneficial to keep both pumps not only for flowrates/pressure, but you would also have pump redundancy, meaning if one of your pump fails your CPU won't overheat.
The Laboratory
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CPUMotherboardGraphicsRAM
AMD FX-8350 Vishera 8-Core 4.0GHz Asus Crosshair V Formula-Z Radeon R9 290X Generic 1333MHz R.A.M. 
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Wester Digital 5400RPM HP CH20L "The Russian Winter" Windows 8 
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The Laboratory
(11 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8350 Vishera 8-Core 4.0GHz Asus Crosshair V Formula-Z Radeon R9 290X Generic 1333MHz R.A.M. 
Hard DriveOptical DriveCoolingOS
Wester Digital 5400RPM HP CH20L "The Russian Winter" Windows 8 
KeyboardPowerCase
Steel Series Merc Fatal1ty 1000Watt PSU DIY Rig 
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