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Recommendations for SMA8 build and other questions.

post #1 of 10
Thread Starter 
I'm in the planning stages for an SMA8 loop (case should be here mid-may), and wanted a little input. The loop will be cooling a heavily OC'd CPU and heavily OC'd 1080ti's, and i'll likely end up using a mono-block for mobo/CPU. I haven't decided on the CPU yet (wanted to see how Skylake -X is, since it looks to be coming out in June), but i already have the 1080ti's. I'll probably throw my 3770K in it until I decide what CPU/platform I want to go with. My goal is to basically cool all of this stuff to where the Delta T is well under 10C with fans at low speeds (450 rpm 140mm or 750 rpm 120mm or abouts there) in just about any situation.

One thing I've already decided on for sure, is that I'm going with BQ Silent Wings 3 fans (tested several types, ML's, GT's, NF-F12's and Vardar F3's). Their cooling performance at low RPM's in push/pull were as good as the GT's from my tests, and their sound characteristics are better (Can't stand the motor sound of the GT's). I'll be doing some benchmarking im sure, so having fans that I can crank up for max performance while not being irritated by the sound is a major plus.

The plan is to have push/pull for all rads. I'm pretty sold on the HWL Nemesis GTX rads. I like my XE 360 too, and i think they would do just as well in push/pull, but there are no 140mm variants, which means less rad space. I'm open to other suggestions.

Plan for rads (all push/pull):
  • Top: 1x480
  • Front: 1x280
  • Bottom 1: 1x560
  • Bottom 2: 1x280

My question about the rads is about push pull for the bottom; what would be the best way to do it? I assume you want both rads to be blowing out either side, but from my calculations i'm going to end up with about a 60mm gap between the rads/fans. Is that going to cause any sort of airflow issue, or will this be fine?

Another question I had was regarding pumps. With so many rads, SLI and a mono-block, would going with 2 D5's probably be the way to go? Would a dual loop be better here, or will a single loop perform the best? If I go dual loop, what would the rad breakdown suggestion be? I figure the 480 for CPU/mobo and the rest for the GPU's. That sound about right?

Any input would be appreciated.
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post #2 of 10
Before I answer some of your questions, what is your average and maximum ambient temp?
post #3 of 10
Thread Starter 
average will be about 20. max maybe 22
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post #4 of 10
Celcius or Fahrenheit ?
post #5 of 10
Thread Starter 
celcius
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post #6 of 10
You may want to check Jayz 2 cents on Youtube on how he designs his Skunkworks just to give you some basic ideas. Base on your average and maximum ambient temps, I don't think running dual fans on Hardware Labs GTX radiators will benefit that much. I believe those are design for PUSH fans. You may want to use a good fan controller with sensors instead. Adding more rads to your loop has diminishing returns. In my opinion the best optimized number of rads will be around 3 if you use multiple gpu blocks. Always remember your water temp will not go below ambient. But its always a matter of taste and preference. I hope that helps.
post #7 of 10
Thread Starter 
thanks for the response. I was going based off of xtremerigs rad roundup. p/p cooled about 20% better than push alone. I'm definitely going overboard here, but thats part of the fun.
Edited by ttnuagmada - 4/18/17 at 1:50am
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post #8 of 10
Quote:
Originally Posted by ttnuagmada View Post

My question about the rads is about push pull for the bottom; what would be the best way to do it? I assume you want both rads to be blowing out either side, but from my calculations i'm going to end up with about a 60mm gap between the rads/fans. Is that going to cause any sort of airflow issue, or will this be fine?

It will always be a compromise when you restrict airflow or use hot air exiting from one rad to feed another.

Best bet would be to ensure all rads have cool ambient air entering their intakes and then combine exhausts out through the least restrictive path.

The exhausted air will fight itself somewhat as you will have the lower rads exhausting into each other with a relatively small clearance - How much this will affect the overall efficiency is not easily calculated. However many people have used similar setups in the past and they do work OK without too many detrimental effects that anyone has noticed.

Ideally you would want to run the pedestal on the SMA8 which would allow you to run another 560 in the lower chamber and not use any 280 rads at all. This results in much higher cooling efficiency albeit at the expense of added height to the case.

BTW - If you are handy - You can mod the top of the SMA8 reasonably easily and add a 560 up top...smile.gif


Check out my SMA8 build which contains 3x 560 rads: http://www.overclock.net/t/1582417/build-log-downunder-sma8-build-d-j-vu
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post #9 of 10
Thread Starter 
Quote:
Originally Posted by Costas View Post

It will always be a compromise when you restrict airflow or use hot air exiting from one rad to feed another.

Best bet would be to ensure all rads have cool ambient air entering their intakes and then combine exhausts out through the least restrictive path.

The exhausted air will fight itself somewhat as you will have the lower rads exhausting into each other with a relatively small clearance - How much this will affect the overall efficiency is not easily calculated. However many people have used similar setups in the past and they do work OK without too many detrimental effects that anyone has noticed.

Ideally you would want to run the pedestal on the SMA8 which would allow you to run another 560 in the lower chamber and not use any 280 rads at all. This results in much higher cooling efficiency albeit at the expense of added height to the case.

BTW - If you are handy - You can mod the top of the SMA8 reasonably easily and add a 560 up top...smile.gif


Check out my SMA8 build which contains 3x 560 rads: http://www.overclock.net/t/1582417/build-log-downunder-sma8-build-d-j-vu

Thanks for the input. That is one pretty computer you have there.
Edited by ttnuagmada - 4/19/17 at 5:25am
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EK XE 360 rad with Be Quiet! Silent Wings 3 fan... Windows 10 pro Monoprice 27" IPS-Glass Panel Pro LED Overlord Tempest X270OC 120hz IPS 
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post #10 of 10
Quote:
Originally Posted by ttnuagmada View Post

That's one pretty com
Thanks for the input. That is one pretty computer you have there.

ThX... thumb.gif
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CPUMotherboardGraphicsGraphics
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Corsair CMD32GX4M4B3200C16 Samsung 512GB 950 Pro M2 Samsung 1TB 850 Pro Custom 
OSMonitorKeyboardPower
Win 10 ASUS PG278Q Corsair K70 RGB Corsair AX1500i 
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