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Multiple rads, and multiple blocks... D5 or MCP35X2-BK? - Page 2

post #11 of 37
Quote:
Originally Posted by ZytheEKS View Post

Damn, you had me excited there for a second. I was thinking about selling off my MCP35xs and installing 3 MCP50xs in my XSPC DDC x3 acrylic top. Now THAT would be something.

I know right? I was pretty surprised when I found out about the incompatibility. Unless WCing companies respond with a new line of tops just for the MCP50X, this could be a potential deal breaker for many people.
post #12 of 37
Thread Starter 
Quote:
Originally Posted by King4x4 View Post

I have an EK D5 with plexi head running the following:
6x XTX480 rads
1x XT360 Rad
1x Supramacy CPU Block
1x EK RIVBE Block
4x290x Plexi blocks in Semi-Parallel fow.

The pump is sufficient if you are running low restriciation blocks and in parallel.

Wow.. good to hear that! My initial calculations said the D5 would be fine... but last minute jitters and worries... know what I mean? lol! And the rads are very low restriction, and the blocks are pretty low also. Thanks for the input!
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post #13 of 37
Thread Starter 
Quote:
Originally Posted by EpicFruit View Post

You're quite welcome! I think it's about time to bring the MCP50X to the WCing community's attention, it's just around the corner, and could be a real game changer if it really is "substantially" cheaper than the MCP35X.

From everything I've been able to find so far, I've learned that it is produced in-house by Swiftech, which may explain the lower price, but the exact MSRP has not been set. It debuted at CES 2014, where it proved to be more powerful than the MCP35X in a live demonstration. According to the media that visited the Swiftech suite at CES 2014, the MCP50X is about on par with the MCP35X in terms of noise, but runs noticeably cooler. Lastly, I learned from a Swiftech rep that the MCP50X will not be compatible with existing DDC tops and mods. Right now the only known component to be compatible with the MCP50X is the upcoming Maelstrom V2.

It does sounds like it will be well accepted in the WC community, and Swiftech builds good gear!
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post #14 of 37
Thread Starter 
Quote:
Originally Posted by ZytheEKS View Post

It's a nickname my friend gave my system because he thinks overkill cooling is entirely unnecessary. XD Won't truly be the russian winter till I order my TEC waterblock from Fox and get my TEC controllers from Krow. biggrin.gif

Anyways, whether it will be enough is depending no what kind of flowrates you want. Three blocks in parallel will give you precisely 1/3 flowrate through each block. So if you're shooting for 1 gallon per minute, or about 225liters per hour if you're metric, you should be able to manage.
Take a look at this graph.




At 1/3 the 225LpH you will have around a 20-25mbar pressure drop, or in non annoying talk .3PSI pressure drop. That means the graphics cards will give you around .9 psi pressure drop which is actually .2PSI LESS than one block @ 1gallon per minute, or 225liters per hour if you're metric.

@ 100% a single D5 will probably give you slightly over 1GPM, but keep in mind each video card waterblock will only get 1/3 that flow, so it's up to you whether you're okay with that little flow through a video card waterblock.

thanks for the explanation... I am kind of in a quandary here, I think the D5 would be adequate.... but is that what I want? lol! (I always prefer to over engineer things... better too much than not enough, that is my motto! Holds true for food, sex, beer and head pressure / flowrate, right?)

Obviously {cough Russian Winter cough} you like to over engineer a bit too... wink.gif
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post #15 of 37
Quote:
Originally Posted by cgipson1 View Post

thanks for the explanation... I am kind of in a quandary here, I think the D5 would be adequate.... but is that what I want? lol! (I always prefer to over engineer things... better too much than not enough, that is my motto! Holds true for food, sex, beer and head pressure / flowrate, right?)

Obviously {cough Russian Winter cough} you like to over engineer a bit too... wink.gif

If it's worth doing it's worth over doing, go big or go home right?
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post #16 of 37
The point of using parallel GPU's is that it allows you to use over 1 GPM in the loop, otherwise you would be better off just using everything in serial.

If you rather use 2 GPM in the loop, that is about 3.2 PSI on the CPU, about 1 PSI for the GPU's total, the water flows through all 3 simultaneously so the restriction is not 3x 1/3 of the flow rate, it is the restriction of 1 block divided by 3 . That doesn't leave much for the rads using a D5 so you would actually achieve somewhere just under 2 GPM.
1/3 the flow of just under 2 GPM looks a lot better than 1

Using a 35x for high flow rates means high temps on the pump. Less so the X2 because it would not need to be at full power.

Triple GPU is a point where it seems hard to get much of a difference between using all serial and Parallel. I would just stick with the simplicity of serial.
Edited by Jakusonfire - 3/4/14 at 10:19am
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post #17 of 37
Thread Starter 
Quote:
Originally Posted by Jakusonfire View Post

The point of using parallel GPU's is that it allows you to use over 1 GPM in the loop, otherwise you would be better off just using everything in serial.

If you rather use 2 GPM in the loop, that is about 3.2 PSI on the CPU, about 0.7 for the GPU's. That doesn't leave much for the rads so you would actually achieve somewhere just under 2 GPM.
1/3 the flow of just under 2 GPM looks a lot better than 1

Using a 35x for high flow rates means high temps on the pump. Less so the X2 because it would not need to be at full power.

Triple GPU is a point where it seems hard to get much of a difference between using all serial and Parallel. I would just stick with the simplicity of serial.

You do make some good points...more to think about! Thanks for the input! smile.gif
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post #18 of 37
Quote:
I have three radiators (2x Alphacool ST30 280's, and a Alphacool Monsta 80mm 420). I will be using a EK Supremacy CPU block, and three EK 780Ti waterblocks.


If you asked, I would definitely go with the 35x/2 and serial on the blocks. It's like big hemi power, go serial... that's why you have a big honking pump.
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post #19 of 37
Thread Starter 
If I went serial.. what should I expect on coolant temps rising on the downstream GPU's? Probably 1 to 2 degrees C per GPU? Pretty minimal I would expect, with adequate flow rate?

I might wait and see what the new Swiftech MCP50x/2 looks like... that sounds like a sweet pump!
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post #20 of 37
Quote:
Originally Posted by cgipson1 View Post

If I went serial.. what should I expect on coolant temps rising on the downstream GPU's? Probably 1 to 2 degrees C per GPU? Pretty minimal I would expect, with adequate flow rate?

I might wait and see what the new Swiftech MCP50x/2 looks like... that sounds like a sweet pump!


Downstream? There really is no downstream or upstream because its a closed loop. The water temp will equalize and because you would have enough head pressure it would not matter anyways. That said temp differences would be minor, 1-2 degrees is typical.

Btw, going parallel on gpu blocks is a band-aid for weak pump/s.
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