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[Build Log] Pandamonium (TH10 w/Ped, RIVE w/3930K, Tri-SLI EVGA 670 4GB SC, Water Cooled) - Page 33

post #321 of 431
Thread Starter 
Here's the final test results, I will put them in some graphs Friday. I can say that the results show that pump speed had a bigger impact on CPU temps, fan speed had bigger impact on Delta T. Since CPU temp is what I am after I plan to run at 40% fan speed and 100% pump speed, the noise is very manageable.

For some reason a bunch of my inline temp sensors stopped working today. I moved them to posts with working sensors, and no result, and when I moved working sensors to the posts they were using the posts reported just fine. Very weird I would lose 5 at once, I'll play with it later though.

I had enough left to do the testing so below are the results. Same test conditions as previous testing.


40% fans, 30% pumps, Delta T of 3.7




Same test with 100% pumps, no appreciable change on Delta T but CPU temps came down a few degrees.




50% fans, 30% pumps, Delta T of roughly the same, the screenshot just was at a moment when it blipped up but you can see the average in the box.



Same test with 100% pumps, again we see the CPU temps come down a bit, so did Delta T.





60% fans, 30% pumps, Delta T similar to 50% fans, 100% pumps, but the CPU temps were higher with the higher fan speed and lower pump speed.




60% fans, 100% pumps, overall similar performance as low pump levels.




70% fans, 30% pumps, Delta T is lower but CPU temp is pretty much unchanged.




The trend continues, pump speed is definitely lowering CPU temps more than the fan speed.




The rest of the results follow a similar trend, included below for completion.






post #322 of 431
max delta T is 4.2 pretty neat...superawesome pictures....repped...
post #323 of 431
Keep in mind that with a 35X, 60% and 100% are very similar speeds; so going from 30% to 100% is basically the same as going from 30% to 60%.

I noticed that you have a flow meter labeled rads and one labeled blocks with different flow rates: exactly how do you have this plumbed? If you followed the diagram on your front page, then there would only be one flow rate.

[Edit]
Aside from that, something seems odd. With four 35X pumps and GPUs in triple parallel, you can't even hit 1gpm?
Edited by Electrocutor - 9/21/12 at 6:40am
post #324 of 431
Thread Starter 
Quote:
Originally Posted by prathik7 View Post

max delta T is 4.2 pretty neat...superawesome pictures....repped...

Thanks!

Quote:
Originally Posted by Electrocutor View Post

Keep in mind that with a 35X, 60% and 100% are very similar speeds; so going from 30% to 100% is basically the same as going from 30% to 60%.
I noticed that you have a flow meter labeled rads and one labeled blocks with different flow rates: exactly how do you have this plumbed? If you followed the diagram on your front page, then there would only be one flow rate.
[Edit]
Aside from that, something seems odd. With four 35X pumps and GPUs in triple parallel, you can't even hit 1gpm?

I agree on the pump speed being flat at 60% to 100%. On the loop I ended up putting all the motherboard blocks one after another instead of split between pumps. I noticed the flow rate as well, but I wonder if that is a combination of all my 90 degree fittings and overall the large number of fittings.
post #325 of 431
Quote:
Originally Posted by Reglar View Post

I agree on the pump speed being flat at 60% to 100%. On the loop I ended up putting all the motherboard blocks one after another instead of split between pumps. I noticed the flow rate as well, but I wonder if that is a combination of all my 90 degree fittings and overall the large number of fittings.
So you have all 4 pumps one after another? And... why are there two different flow rates?
post #326 of 431
Thread Starter 
Here are the graphs I promised.

First up, Delta T. You can see a clear relationship between fan speed and temperature, while pump speed has not significantly impacted the Delta T.




Here are the CPU temps at the same fan speeds. You can clearly see a consistent improvement in performance with the higher pump speed. The dashed lines are trend lines.




This is the same data, but with a different scale. I did this up just to highlight that while there is an appreciable difference at the pump speeds, overall the higher pumps are not having a large overall impact.

post #327 of 431
Thread Starter 
Quote:
Originally Posted by Electrocutor View Post

So you have all 4 pumps one after another? And... why are there two different flow rates?

Sorry, let me try again. I don't have time for a pretty picture, so here's the order in a list.

  1. Res1
  2. Pump1
  3. Flow1
  4. QDC
  5. CPU
  6. GPUx3 (parallel)
  7. Chipset
  8. VRM
  9. QDC
  10. Res2
  11. Pump2
  12. Flow2
  13. 120.4
  14. 120.4
  15. 120.4
  16. Aquaero5 Block
  17. 120.4
  18. 120.3
  19. Res1
post #328 of 431
Quote:
Originally Posted by Reglar View Post

Sorry, let me try again. I don't have time for a pretty picture, so here's the order in a list.
  1. Res1
  2. Pump1
  3. Flow1
  4. QDC
  5. CPU
  6. GPUx3 (parallel)
  7. Chipset
  8. VRM
  9. QDC
  10. Res2
  11. Pump2
  12. Flow2
  13. 120.4
  14. 120.4
  15. 120.4
  16. Aquaero5 Block
  17. 120.4
  18. 120.3
  19. Res1
Actually, I figured it out, and that's not your loop. I'll draw it up in notepad so you can see what is happening. Your loop is never being pushed by more than two pumps. You have the potential to better control the flow if you split up the pump speeds into 2x2. One set powers the blocks, one set powers the radiators, but you'd have to make absolutely sure that the set power the rads always has a higher flow rate than the one powering the blocks, otherwise you will run the same water through the blocks without ever having gone through the radiators.
post #329 of 431
How on earth do you bleed a system like yours? I would be in tears.
post #330 of 431
Love the graphs. I hope to do something like that also when I'm done. Surprised at the large difference in temps for 30% vs 100% pump speed. How bad is the sound of the pumps at 100%. Are you going to settle somewhere in the middle?
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