Asrock B550M Pro4 Fan/pump headers
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=23394
Printed Date: 03 Nov 2024 at 9:54pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Asrock B550M Pro4 Fan/pump headers
Posted By: shamanji
Subject: Asrock B550M Pro4 Fan/pump headers
Date Posted: 30 Mar 2022 at 11:12pm
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My girl friends pc has a cooler master masterliquid ml120r rgb, and the pump is connected to the cpu fan 1 header and running at full speed 2400rpm set in the bios, the 2x fans are connected with a Y-Splitter to cpu fan 2 Setup like this Cpu Fan 2 Control Mode : Auto | Cpu Fan 2 Setting : Silent | Cpu Fan 2 Temp Source : Monitor. but accourding to cooler master that is not rightly connected, can anyone explain why? My own cm 360 is also connected like my gf is. FANS: The radiator fans should always be connected to CPU Fan 1 and CPU Fan 2 (or CPU Fan OPT) on the Motherboard. Single Radiator Fan: Connect the fan to CPU Fan 1. Two Radiator Fans via Y-Splitter: Connect the adapter to CPU Fan 1. CPU Fan 2 / OPT can be left unused. Two Radiator Fans without Y-Splitter: Connect one fan to CPU Fan 1 and the other to CPU Fan 2 / OPT. Four Radiator Fans via Y-Splitters: Connect one adapter to CPU Fan 1 and the other adapter to CPU Fan 2. PUMP: Its recommended that the pump be connected to an alternative fan header on the motherboard such as System Fan 1, Chassis_Fan 1, or for newer motherboards a dedicated pump header. |
Replies:
Posted By: Xaltar
Date Posted: 31 Mar 2022 at 12:18am
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The CPU Fan 2 header on your board has a setting for water pump mode. I suspect that is what Cooler Master is concerned about. Connect the pump there and the fans to CPU Fan 1. Then set the CPU Fan 2 to Water Pump mode (WP). If you are worried, swap the pump to CPU Fan 2 and set it to water pump mode. This switches the fan header to a voltage regulation mode as opposed to PWM. Sorry, I didn't notice in your previous post that you had the fans and pump hooked up to the wrong fan headers. PWM (Pulse Width Modulation) can damage the pump as it in essence switches power to the header on and off rapidly to maintain a specific RPM (for fans). That is why they recommend using the CPU Fan 2 header which can be switched to pump mode (or DC mode if connected to a chassis fan header). It won't hurt the pump in the short term but over continuous use it can. If the header was set to full speed the risk of damage is small however. ------------- 
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Posted By: shamanji
Date Posted: 31 Mar 2022 at 1:06am
| Ok, thanks ill try that :) |
Posted By: shamanji
Date Posted: 31 Mar 2022 at 1:33am
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So Cooler Master Masterliquid Ml120R Rgb has 2 fans, 1 on each side of the radiator. 1.Two Radiator Fans via Y-Splitter: Connect the adapter to CPU Fan 1. CPU Fan 2 / OPT can be left unused. 2.Two Radiator Fans without Y-Splitter: Connect one fan to CPU Fan 1 and the other to CPU Fan 2 / OPT. So wich of these 2 options should i use? |
Posted By: Xaltar
Date Posted: 31 Mar 2022 at 2:23am
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I would use CPU Fan 1 header with the splitter. With a push pull config, one on each side of the rad, you want the speed balanced so a Y splitter on the same header works well. -------------
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Posted By: shamanji
Date Posted: 31 Mar 2022 at 3:41am
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Ok, Thanks thats how it's runs now tho temps are the same as before :) Also i got in my computer a Cooler master MASTERLIQUID ML360 RGB TR4 EDITION. Should i also place pump on cpu fan 2 and set it to W_pump? Should i also use 3 splitter for the 3 fans on the radiator and put those on cpu fan 1? these uses a pwm connector so i geuss they ajust them self in speed acourding to temp |
Posted By: Xaltar
Date Posted: 31 Mar 2022 at 5:53am
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It's not necessary to split them on a 360 radiator. It's only with push pull I ever use a splitter and even there, I use a splitter for each set (1 push 1 pull). If you have a header that has a w/pump setting I would always recommend you use it for the pump. As I said before, it doesn't really hurt anything not doing it (provided it's set to full speed) but it also doesn't cost anything to do it right  It might give you a bit more life from your pump before it wears out and dies. As to how long that will be, I guess it depends on the pump. My Corsair H105 is still going strong after 5 years of near constant use. Many AIO manufacturers use the same pumps as each other, just packaged/branded differently. -------------
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Posted By: shamanji
Date Posted: 31 Mar 2022 at 10:17am
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but dos is there anything wrong with splitting 3 way on the Cooler master MASTERLIQUID ML360 RGB TR4 EDITION? Dos it make the fans run worse or do i get worse coolinmg? Should i put them each 3 of them on each fan header on the motherboard? |
Posted By: shamanji
Date Posted: 31 Mar 2022 at 11:22am
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On my girl friends motherboard cpu fan 1 can only be set to : Custum/silent/standard/performance/full speed and only that, cant choose w_pump on that. The rest of the fan headers on the motherboard can be set to w_pump mode. The same goes for my motherboard onlybi have alt more headers on the motherboard asrock trx40 creator. So is it wrong to use a 3 splitter on 3 x fans and on to 1 header the cpu fan 1 header? |
Posted By: Xaltar
Date Posted: 31 Mar 2022 at 2:08pm
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I wouldn't recommend a 3 way splitter no. Each header is specifically designed to provide a certain amount of power (wattage/amps). Overloading fan headers is never advisable. All that matters with the pump is that it is connected to a fan header with a w/pump setting and is set to use it. It does not matter which header you use. -------------
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Posted By: shamanji
Date Posted: 31 Mar 2022 at 3:22pm
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Ok. My gf mobo has cpu fan 1 and cpu fan 2 / wp and 4x chassis / wp headers, were cpu fan 1 is the only one that cant be changed to w_pump in the bios so that is not a wp header. My mobo had cpu fan 1 and cpu fan 2 / wp and 3x chassis / wp headers were cpu fan 1 is the only one that cant be changed to w_pump in the bios so that is not a wp header. So ill just choose cpu fan 2 / wp or one of 3/4 chassis / wp headers for the pump and set it to w_pump in the bios for both motherboards. What would you recommend for my gf 2x radiator fans and mine 3x radiator fans ? Put each fan on 1 header pr fan? |
Posted By: Xaltar
Date Posted: 31 Mar 2022 at 3:31pm
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For your 360 radiator, yes, each fan to it's own header. If you are short of fan headers (because of other case fans) then you can use a 2 way splitter for 2 of them. If you have enough headers on your board give each fan it's own. For your GF's I am guessing 120mm radiator, I would use a splitter to keep both fans running off a single PWM controller for optimal speed balancing in push/pull config. -------------
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Posted By: shamanji
Date Posted: 31 Mar 2022 at 3:55pm
| Ok thank for the help |
Posted By: shamanji
Date Posted: 31 Mar 2022 at 3:59pm
| So no Lore than 2 fans on each header if I run out of headers |
Posted By: shamanji
Date Posted: 31 Mar 2022 at 3:59pm
| No more |
Posted By: shamanji
Date Posted: 31 Mar 2022 at 5:33pm
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So far on.my machine i have been running pump on cpu fan 1 and the 3x fans on cpu fan 2 with a 3 splitter. I must have been lucky ?? Is there any difgerens in what cpu fan 1 and 2 can withstand ? |
Posted By: Xaltar
Date Posted: 31 Mar 2022 at 6:38pm
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Nah, any damage would be caused over prolonged use. As I said, it's not critical, it's just how it was designed to work. I am sure there are plenty of people who ignore the recommended setup completely. Using a 3 way splitter could potentially overload the fan header. Even then, it wouldn't cause immediate damage, it will just cause the components that provide power to the header to run hotter than they would otherwise. Heat causes degradation over time. By not overloading the headers you extend the lifespan of the header and by extension, your board. That said, the board may well be far past outdated by the time you see any ill effect. In the end it's mostly a peace of mind thing. I doubt you have done damage to the header or your board, particularly as you are likely not running your fans at full speed 24/7. In order to do any real damage your fans would need to draw more power than the header is designed to accommodate and do so for an extended period of time. I hope this makes sense. You asked for the correct way to set these things up and so I have done my best to provide the info you asked for. Much of this is just the safest way/way it was designed to work. That does not mean other configurations don't work or will cause serious damage. You would need to overload the headers quite a bit more than 3 fans to cause immediate damage and in such a case, the board's power protection circuits would likely shut off the machine before serious damage occurred. Boards today have a lot more failsafes and protections than they used to. My intention was never to cause you concern, only to explain how and why you are meant to set up your water cooling this way. -------------
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Posted By: shamanji
Date Posted: 31 Mar 2022 at 7:31pm
| Thanks, you done alt for me, I cant thank you enough ?? |