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Alphacool VPP655 Low/Medium/ or high Rpm?

Discussion in 'Overclocking & Cooling' started by Knoxx29, Jul 20, 2014.

  1. Knoxx29

    Knoxx29

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    Hi everyone
    I have this pump
    image.jpg
    The velocity of this pump can be adjustable from 1000rpm up to 5000rpm and I am
    Wondering at how many rpm should a pump run?

    Every advice will be really appreciate it..
    Thanks
     
  2. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    Run three or four ranges of speed with some sort of a stress test and see if increasing the speed offers any benefit or if a lower speed is sufficient for best thermal performance. Every loop is different, so where I may find full speed is needed for efficiency, you may not need as much to get the best results. Sometimes too much pump speed can hurt thermals as well! ;)
     
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  3. Knoxx29

    Knoxx29

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    D
    does it matter the amount of radiators that I have?
     
  4. eidairaman1

    eidairaman1

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    i would say the more radiators the faster youd want the flow to run to make it through those rads
     
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  5. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    ^ what he said. I usually found that the res can play up at times too with too much speed as it will cause air to cycle through, not just fluid. As I said, try it out, if it works at full speed, have at it!
     
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  6. Knoxx29

    Knoxx29

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    Should I use prime 95 to stress the system?
     
  7. erocker

    erocker Super Moderator Staff Member

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    Whatever loads your system and generates heat will work.
     
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  8. Knoxx29

    Knoxx29

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    Thanks, I just started a 15 minutes prime 95 stress test
     
  9. Knoxx29

    Knoxx29

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    My theory was more radiators more faster the pump should it runs
     
  10. eidairaman1

    eidairaman1

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    Well you gotta be able to get fluid in those separate rads quick enough to gain a heat reduction
     
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  11. Knoxx29

    Knoxx29

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    Test done, the pump was tested at 2000rpm, 3000rpm, 4000rpm and 5000rpm and I didn't notice any benefits temperatures were always the same 68 degrees at full load
     
  12. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    this is what I was saying, no need to push it that fast if its not needed. Could extend the life of the pump as well as less noise and vibration;)
     
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  13. Knoxx29

    Knoxx29

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    Something to correct, i will leave it at 2000rpm because I saw that temperatures were 66 and rarely for a couple of seconds 68, for me it's still a little weird That at lower speed with 2 radiators i get 2 degrees less than at higher speeds:rolleyes:
     
    Last edited: Jul 20, 2014
  14. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    I have found that sometimes more speed from the pump will counteract the radiator....IE the water is passing to fast to be efficiently cooled.
     
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  15. HumanSmoke

    HumanSmoke

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    Probably a case of diminishing returns. Higher RPM means the pump generates more heat which it dumps into the coolant it is circulating. Typically a (12V) D5 uses ~13 to 35W depending on rotor speed. For a happy medium I might suggest a quick browse of one of the more comprehensive watercooling testbenches around (Martins Liquid Lab). The Koolance PMP-450 is just another rebranded Laing D5 (as is the Alphacool, as well as any number of Swiftech MCP655, EK, Danger Den, Phobya models etc.)
     
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  16. Knoxx29

    Knoxx29

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    Thanks a lot for the link, I learned a couple of things of it...
     
  17. Knoxx29

    Knoxx29

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    l has spent more than EUR 600 for my entire setup watercooling and last week I ordered some additional components in order to watercool GPU too ( so far around 800 euro+) and that is why I try to get the best performance of my watercooling, before I decided to build a system of WC I was reading around and learning as much as possible, although I missed some points I still got what wanted and i am really happy with all the goals that I have achieved so far and each time I make an improvement to my watercooling system that's a big satisfaction for me..
     

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