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  1. #1
    ROG Member Array BlippyCheese PC Specs
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    Maximus VIII Extreme, Pump Header and EK-XRES 140 DDC 3.2 PWM - where to connect

    I hope someone from EKWB or someone with knowledge about the M8E Pump Header and EK PWM pumps can chime in on this and a related thread/post. I have an EK-XRES 140 DDC 3.2 PWM pump/reservoir combo. This pump has a molex (yuck) power connector and a PWM 4-pin pump connector as well. The 4-pin pump connector has two wires only - one blue and one green. They are in positions 3 and 4 based on this standard:

    Click image for larger version. 

Name:	4pinFanHeader.JPG 
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Size:	24.3 KB 
ID:	54851 (http://www.overclockers.com/forums/a...8&d=1300219923)

    I can only guess judging by the colors that wire 4 on the pump connector (blue) is the PWM wire and wire 3 is the sense (in) wire (green). This is not discussed in any of the EKWB documents or manuals though (EK - fix that please... ).

    I initially connected my pump to the nicely fitting pump header - seemed like the intuitive thing to do. However, now after reading this post:
    https://rog.asus.com/forum/showthrea...PMs-displaying
    and looking at the manual closely for the M8E, I see that on the pump header, pin 3 and 4 are instead power and ground...

    Is that really the case? I will get out my volt meter to find out - but I am really surprised at this as I suspect that I probably killed the PWM circuitry in the pump: I can't get the "variable" aspects of the pump to work at all.

    Any advice would be appreciated...

  2. #2
    ROG Member Array BlippyCheese PC Specs
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    Well, I answered part of this - now to figure out why the EKWB Pump will not vary in speed...

    The manual and the assertions in the aforementioned post are wrong. The pinout on the w_pump header is the same as the other fan headers, at least based on my volt meter.

  3. #3
    ROG Enthusiast Array EK Luc PC Specs
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    Hi,

    How is you header set in the BIOS?

  4. #4
    untouched Array Praz's Avatar
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    Hello

    Below is from the M8E user manual. As EK Luc stated above check that the header is set to PWM and not 3 pin.


    Click image for larger version. 

Name:	pump.JPG 
Views:	96 
Size:	48.7 KB 
ID:	54860

  5. #5
    ROG Member Array BlippyCheese PC Specs
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    sorry - should have mentioned that I have it set to PWM in Bios. I am also using the included fan control - but only use it for three fans (two of which are PWM and one is just DC). Since it looks like the person that posted on the initially mentioned other thread has an outdated manual (or similar) and since based on my volt meter it is indeed the case that the pump header is pinned the same (thank goodness... ) I will reply back on that thread clarifying as such.

    I would still like EKWB or others with this DDC pump to elaborate on how it should behave. I assumed it would have a reasonable degree of speed variability - and it does not seem to have any. Fan Expert (after tuning of course) seems to think that it does, but I can't either visually or audiably discern any difference from 0 to 100%...

    Thanks!

  6. #6
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    Can you link to the other thread please BlippyCheese?

    Semi-related, I can confirm that the pump used in my EK Predator240 unit will only run at 100% when plugged directly in and set to PWM via the water pump header (and any other fan head) on the z170 Sabertooth.

    (I have fans plugged to the CPU header, and PWM works with them. Water pump connection is plugged to the above mentioned header)

  7. #7
    ROG Enthusiast Array EK Luc PC Specs
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    Do the fans on the Predator at 100% too?

  8. #8
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    I have the fans connected to the CPU main fan header on my mobo using a y-splitter.

    I found that the included built in fan hub on my predator unit was faulty, i.e. when connecting the hub to the CPU Fan main header the predator fans would run at about 10-20%, no PWM control.

    Connecting the predators water pump cable the mobos water pump header only allows it to run at 100%. I've tried PWM and DC methods of control with no luck.

    I'm getting a 1.1 revision next week so perhaps there will be an improvement there. However I intend to control 4 fans on the unit (in push / pull) with a cable splitter and the water pump again on the water pump header. will update in a seperate thread if I encounter any issues, cheers.

  9. #9
    ROG Member Array BlippyCheese PC Specs
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    here is the link to the other thread as requested above:
    https://rog.asus.com/forum/showthrea...PMs-displaying

    In my bios, I have the headers set to PWM, and, plugging any fan into these headers has the results I am seeking - good range of variable speed (I have an EK-Vardar F3-140ER and two EK-Vardar F4-120ER's - both on radiators).

    But I get no variability with the pump.

    Why does this matter? I want as close to silent as I can get when I am doing work that is not CPU/resource demanding ... and at the moment, the Pump is the loudest component by far... much louder than my Swiftech MCP655-PWM-DRIVE on my other PC (it is on a Maximus VI Formula system).

  10. #10
    ROG Member Array BlippyCheese PC Specs
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    Well, I have just really been disappointed with the EK-XRES 140 DDC 3.2 PWM. If it is not really a variable capable pump, then why bother calling it a PWM? I am just likely going to replace it with something that does what it supposed to do - like a Swiftech MCP655-PWM-DRIVE 12v... that is what I have in my other computer and while it whines a bit at certain speeds, when the computer is cool, it is nearly silent. It is too bad that EKWB is not more clear about the behavior of this pump in their marketing.

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