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I need help sorting out fan controller concerns

Discussion in 'Overclocking & Cooling' started by zqa20, Oct 10, 2018 at 9:52 PM.

  1. zqa20

    Associate

    Joined: Jan 13, 2014

    Posts: 17

    So I'm planning on buying the lian li air "link below" and it comes with 3 rgb fans and 2 none rgb fans, which I want to throw out. Now I'm also planning on buying another set of lian li fans, but this pack comes with a fan controller "link below". I'm worried that the rpms don't match and this may cause issues when i try to control the speeds/make a fan curve via the bios.

    Case : https://www.overclockers.co.uk/lian-li-pc-o11-air-rgb-midi-tower-black-window-ca-76v-ll.html

    Fans that come with case: http://www.lian-li.com/bora-lite-120/

    Fan pack + fan controller I want to buy: https://www.overclockers.co.uk/lian...-controller-triple-pack-silver-fg-008-ll.html

    Will I run into many problems?
     
  2. LuckyBenski

    Wise Guy

    Joined: Dec 28, 2017

    Posts: 1,325

    Location: London

    Fan speed isn't generally a factor in fan curves. The thing you're controlling based off temperature is the PWM duty cycle, in percent. So at the start of the curve you may be offering 30% PWM duty cycle which will (roughly) run fans at 30% of their rated speed.

    Increasing temperatures means duty cycle goes up, Fan speeds go up, until at 100% duty cycle they will run at maximum speed. If you have different fans in the system they will run at different speeds, but the duty cycle and proportion of maximum speed will be the same.

    I would be much more worried about the RGB format and connection, different fans use different plugs and control methods. Have you checked if those fans will run off the same RGB controller?
     
  3. doyll

    Soldato

    Joined: Jul 1, 2011

    Posts: 6,821

    Well, the fans are only making 1.23mm H2O at 1500rpm so not as much pressure as I have found to be enough to overcome grills and filters. I want that kind of pressure at 1000-1200rpm.

    But if you are set on using those fans use the 3-pack of higher speed fans as intakes and the other 2 as exhaust. I would not use the top venting. I would go for front to back airflow and remove PCIe back slot covers, use 3x higher speed fans as front intakes and 2x lower speed fans as bottom intakes. I would remove PCIe back slot covers to improve rear exhaust vent area and for better front to back airflow around GpU. I would have case fans all speed controlled bases on component temps of components they are supplying and have case fans's speeds cycle with component fans so when components are idling so with their and case fans idle, and as their load / heat increases so will fan speeds. Below is link to basic guide to how airflow works and how to optimize case airflow.
    https://forums.overclockers.co.uk/t...-i-put-my-temp-sensor.18564223/#post-26159770

    Have you seen the Phanteks RGB Halos? Maybe use them with Phanteks PH-F120MP fans. Just a thought.
     
  4. zqa20

    Associate

    Joined: Jan 13, 2014

    Posts: 17


    Thanks for the advice. I'll have a h105 at the top of my case an the exhaust (there's only an option for an 80mm fan for the rear)

    hmm you have me thinking.

    Now let's say I use the stock 3 RGB fans as intakes at the bottom would you recommend buying 3 of these ( https://www.overclockers.co.uk/phanteks-ph-f120sp-120mm-fan-black-white-fg-016-pt.html ) as front intakes?

    After doing some research the sock 2 none rgb fans un between 900-1900rpm
    https://gyazo.com/6486ed826893aacbf70c8a2a72b618dd

    On a side note I have 2 of these fans brand new and unused should i try buying a 3rd and using these as front intakes?
    https://www.corsair.com/uk/en/Categ...-Single-Pack-H75-Replacement-Fan/p/CO-8950012
     
  5. doyll

    Soldato

    Joined: Jul 1, 2011

    Posts: 6,821

    First thing to understand is we can only flow as much air into case as is flowing out of case .. or .. we can only have as much air flowing out of case as we have flowing in. What flows is must flow out, so the smaller of the 2 (intake vs exhaust) is going to be the maximum case airflow.

    Using bottom intake to top out means heated air coming off of GPU is going to be flowing up and out top.

    If you are to get 3x PH-F120MP I suggest getting 3-pack for £26.00
    https://www.overclockers.co.uk/thre...120mm-fan-radiator-performance-bu-001-pt.html

    I guess the 120SP are okay. I don't like their sound, but maybe that's just me.
     
  6. zqa20

    Associate

    Joined: Jan 13, 2014

    Posts: 17

    Thanks I was just looking at those :).

    If you had the choice (and money) would you buy 2 x 3 packs and use those as front+ bottom intakes? Would this provide good cooling considering I'll have a h105 at the top exhausting air?

    I could just buy the lian li none air and chuck the stock 2 fans, and then install 6 of the fans you recommended
     
  7. doyll

    Soldato

    Joined: Jul 1, 2011

    Posts: 6,821

    You has H105 for CPU.
    What GPU are you using?

    If using all bottom vents I would probably raise case up on blocks, taller feet or castor base so there is a 40-45mm space from case to what it sets on to supply good airflow area to bottom vents. This make a big difference in both better airflow and lower noise.

    As I understand it, the case has 3x front, 3x bottom, 3x top (2 used by H105) and 1x rear vents (make it 2x rear vents with PCIe slot covers removed). That means a maximum of about 5x exhaust venting with 6x intakes. So 6x intakes should be able to move plenty of airflow without running too fast.

    Don't know what motherboard you are using but you may need to use PWM splitters or hubs wiith PSU power so fans don't overload mobo fan headers.

    Depending what fans are on H105 you might want to use same on PH-F120MP on it. 2-pack is only £14.99 ;)
    Betting.on.the.Bride.2017https://www.overclockers.co.uk/two-fan-bundle-phanteks-ph-f120mp-pwm-120mm-fan-radiator-performance-bu-002-pt.html
     
  8. zqa20

    Associate

    Joined: Jan 13, 2014

    Posts: 17

    Currently 2 sp120L fans..I think they go up to aroud 2700rpm but they never get that high :p.
    It's actually 6x front 3x bottom 2x rear (80mm) and 3x top
    https://gyazo.com/c25e5dac3c4163ace978ced1dc095567

    I won't be mounting rear fans due to the 80mm limitation.


    Looking at that picture what fan + aio setup would you have with this gear

    3x RGB lian li fans (ones that come with case
    3x PH-120MP
    h105 (x2 sp120L)
     
  9. zqa20

    Associate

    Joined: Jan 13, 2014

    Posts: 17

    I'll have 2 of the stock 120mm fans left over hat come with the case
    With my gear + your setup will I have pretty cooling + air flow?
     
    Last edited: Oct 11, 2018 at 5:57 PM