Two fans on cpu header. It has to run at full RPM (full +12V) at all times.

Two fans on cpu header You can't "mix" the tach Assuming you don’t have a splitter or cpu opt header just use a fan header. I have a PWR FAN header that has no control associated with it. so for 6 fans I would do 3 in the front to one splitter on sys_fan header, 1 fan in the back to sys_fan header, and the 2 on radiator to cpu_fan header. There is the Asus H170I-PLUS D3 motherboard with two separate chassis fan headers but it only uses DDR3/DDR3L RAM. Often abbreviated as CPU_OPT, this header is usually found in conjunction with the CPU_FAN Header on select high-end motherboards. One reason why it's better to use both fans off one header; they will both be controlled the same. Skill Ripjaws 3600 32GB, I'm not sure about your board, but most fan headers on most boards support 1A of load, some even more. can i go for a splitter or should i stick to psu molex cable running my fans at full speed. 4 Amps total. my mobo only has one place labelled cpu_fan, one labelled cpu_opt. You want that running at full to move water around. The sys fan header is not positioned in the edge unlike the cpu fan header so if I install external fans on the sys fan header, my pc would look messy so I was thinking of plugging the cpu fan cable into the sys fan. mv2devnull I read the board spec on Gigabyte website and it says that 1 Cpu fan head and 2 system fan header, so 3 Fan header in total. Most headers will handle up to 1 never had a lick of issues running three SP120 PE fans off one header for 2. Hi, I've bought a Gigabyte A320M motherboard but it only has two fan headers, one being CPU, because I don't know how much you can put on one fan header, am I ok with using a hub that adds 4 more headers to run 3 case fans off of that one header on the motherboard? Share Add a Comment. They're super quiet, but lower airflow. Thanks to the inbuilt failsafe most motherboards have, your computer will only turn on when there's something plugged into the CPU_FAN header. They will all be controlled by temp of the system so long as your fans have the 3 or 4 pin connectors that fit with these products. I've heard that in push pull does anybody know if I can connect two identical PWM Fans (es. If not, connect the fans to CPU_FAN and CPU_OPT, and the pump to a My board has two CPU fan headers. 2 Amps, then you are pulling 0. So yes, just connect it to case header. Reply reply More replies. I'm not sure which way will give them the most even performance. I have a noctua 9B CPU cooler, which comes with two fans and a splitter to connect to one CPU header. A few have more than 2 SYS_FAN ports. recently discovered that most motherboard headers only rated for 1A, should i switch one fan hub to the cpu and have the pump and 2 fans to split the load amongst the headers. For my mother board it’s a MPG B560I GAMING EDGE MB. at 100% they run 2275rpm. Here's an example: Hello. If your CPU cooler uses two different headers, you can plug the main one into your CPU_FAN header and the other one into your CPU_OPT header. r/nvidia. Maybe that's what you read about "you have to set the voltage for the header", and this is NOT something special for the CPU_OPT header. tl;dr version: If your getting a CPU Fan Error, and your fans are working, try plugging your CPU fan(s) into header 2 and then plug your rear case fan into header 1 and A motherboard’s 4-pin CPU_OPT (‘CPU Optional’) header is its optional header for plugging in CPU fans. Hard tube loop, cpu and gpu 2. Most of the time it is. If your headers They give RPM feedback and control through the 4 pin via PWM or DC with 3 or 4 fan splitters, delivering full potential power without the risk of burning your shit up. :) The CPF01 will let you put two fans into one header. Hard loop cpu and gpu 4 360 AIO: Memory: 1. Is it ok if I use the CPU fan header to power the CPU fan + and then x4 Noctua NF-A14 PWM 2 for top for take the air out and then 2 front for take air inside , i open the fans out of the box and all come with a splitter (up to two fans), i can a splitter for 2 (front) so basically 2 fan into a header and the other 3 fans the back and two top use this splitter come with this noctua fan controller see in The only thing remaining is the fans, and you see two fan header options: CPU_FAN and CPU_OPT. 5-2A. My case supports 4 120 mm fans. When it comes to CPU OPT vs CPU FAN, CPU FAN is used as the primary header for fan control and power in your PC. whether at reduced DC or 100% startup, idle or loaded. 1 x 4-pin Chassis Fan header: running a 3-pin Antec Tri-Cool fan, mounted to the side panel of my case, with the ext. OK so i run a dual fan heatsink on my CPU. As an example, I have the h115i. com/Molex-Computer-Connector-Y If so, you can use the splitter to connect both fans to CPU_FAN, and the pump to CPU_OPT or a different header. Connecting fans to the motherboard is a straightforward process that involves identifying the fan headers on the motherboard and plugging in the connectors: Locate the Fan Headers: Your motherboard is equipped with various headers typically labeled as CPU_FAN, SYS_FAN, CHA_FAN, etc. 2. 5 years. Wouldn’t do more than that. It is My motherboard has 1 case fan header, but the case I'm going to get has room for 5 fans, which I intend to max out. Virtually all computer case fans and CPU cooler fans (INCLUDING your Cooler Master MasterFan MF120R ARGB units) use a 12 VDC supply, and so that is ALWAYS what the CPU_fan header puts out. Say I have a 360mm radiator with 3 fans on it for CPU cooling. Source: I use my second CPU/Pump header for a fan. Therefore, I'm going to use 2 splitters, and connect one to the case fan header. Would i have to "daisy chain" the 2 fans to go onto the one header, if that'd even be possible? You can buy a Y-splitter so you can connect both fans to the cpu header but your second idea will work just as good. A few even have a second CPU_FAN port for systems that use 2 fans on the CPU cooler. I would use the two CPU fan headers for the two fans. do i plug that into either the 4-pin headers offer longer life expectancy, less noise, and better speed adjustments compared to 3-pin headers. Standard fan headers are usually rated at 1 amp unless it specifically states in the manual that it's a high current header. I use that header for my pump. Most SYS_FAN and CHA_FAN Headers will be 4-Pin, but you can also connect 3 The CPU2 fan header may or may not be a 4-pin PWM header. By adding a second fan, you can enhance the cooling efficiency and increase the airflow over the heatsink. I'm thinking daisy chain but if I run them separately then I can monitor each one Processor: AMD 3900X \ AMD 7700X: Motherboard: ASRock AM4 X570 Pro 4 \ ASUS X670Xe TUF: Cooling: D15: Memory: Patriot 2x16GB PVS432G320C6K \ G. B. Skill Flare X5 F5-6000J3238F 2x16GB so i’ve got an aio cooler, the pump and fans each have 2 connections, 1 each for rgb. Do I need this adapter I’m considering an air cooler for my first build using a Ryzen 5 7600x and a cooler like the Noctua D15 or U12A. Whatever looks easier to manage for you. All are not being used except for cppu fan header. So, using the CPU_OPT for a case vent fan is not ideal because it is guided by the wrong temperature. That way the mobo will read the speed of that fan. I actually don‘t like to split the fan adapter and connect two fans in one fan header. Upvote 0 Downvote. http://www. The CPU fan must be plugged into the CPU_FAN header for the system to boot properly and prevent CPU Personally, running two fans on the cooler I would connect to the CPU_FAN header with a splitter cable. This leaves nowhere for the front 3 fans to be plugged in. RELATED: Motherboard Components – A Guide To Building Your Own PC. That seems the least confusing. 2GHz -1. No more than 4 fans per header (you’ll see a lot of powerless 4 fan hubs out there, then everything above will require power from PSU). CPU cooler: DeepCool AK620 (dual tower with two fans) front in take: 2 x 140 noctua PWM fans top exhaust: 2 x 120 noctua PWM fans back exhaust: 1 x 120 noctua PWM fan (I wanted to post a picture of the manual but I can’t, here is the relevant page about the fan headers, please see page 20. 2 fans are for the AIO pump (share 1 connection) and the other 3 are front mounted on the case. ) Here is my config I will be having: Motherboard: Gigabyte GA-H81M-DS2V CPU Fan Header: Arctic Freezer Pro 7 Rev. Your motherboard has 2 system fan headers and 1 cpu fan header, so you should be fine with 3 fans on Computer booted, worked great. I have a ASUS TUF Z590 motherboard which has 2 options for CPU fan headers: CPU_FAN and CPU-OPT. 37amp ) . I have a Noctua NH-D15 comming in the mail today, and I just finished the rest of my build. The thing is, I have an H80i GT connected to just one CPU header, and that's a pump and two fans drawing power from one header. In You will have a CPU, AIO and CHASSIS fan header on the top. In virtually all cases, the CPU_OPT header will do exactly the same thing as the CPU_FAN header, except that you can set the Mode (above) differently for these two. just my 2c worth. It’s only has three headers up top the CPU_Fan, AIO_Pump, and System_Fan. Using two fans for CPU cooler, but only one CPU_FAN connection. amazon. CPU OPT is an optional header that power any other cooling fan that you have. • Connect the fans to the two connectors coming off the pump. going to the exact limit isn't advisable as overloading headers usually kills them (not sure if newer boards start AIO pump to CPU_FAN AIO Radiator fans 1,2,3 to CPU_OPT (3way header splitter) AIO Radiator fans 4,5 to SYS_FAN4_PUMP You shouldn't be recommending first time builder to plug in the pump into CPU Fan header. If fan headers are an issue, just use a powered hub with PWM support. Will that work the way it is. In your case, the fan is of the newer PWM design to it will be just fine connected that way. Can I just strap two of them on my CPU air cooler and route them to the hub like the rest of them. Never connect the pump to a variable speed header like the CPU. Just use PWM splitter and connect it to cpu fan. I've had motherboards that usually supported 1. 4a for two fans? seen tested as Hell, a dual-fan cooler usually comes with one in the package so you can run it from just the CPU_FAN header. The CPU one holds up to 1A. Can I use the pump fan header as cpu 2 or is that a bad idea, I see lots of the inverse (plugging a pump into a Now, most mobo headers can supply power at up to 1. for the last 2 months ive had 6 fan conected to system fan header and the pump to cpu fan header. I've already got a 3 way splitter for the front fan plugged into the system fan The power draw will vary between fans but motherboard fan headers should generally supply enough power for at least 2 fans each. Is It Possible To Connect The Sys Fan With The Header Of A CPU Fan? Yes, it is. These fans each have their own cables. 2 x 4-pin CPU Fan headers: running 2 CPU fans in a push pull set up, thru the radiator below. You can usually safely go up to three fans on a single header. 2a so max is generally 3. Fans amperage combine is (2 x 0. Im using the same strat on b450 toma max i have the pump connected to pump header on the mb and 2 fans connected to cpu fan header via fan splitter soo that i The CPU_FAN and CPU_OPT headers use only the temp sensor built into the CPU chip. There are 3 fan headers: CPU fan with 1A max current Two small 120mm on bottom and two up top on the radiator. 2 fans per header essentially https: Both are occupied by intake fans. My mobo does have a CPU_2 header. It’s a pump, not a fan. should be able to merge two fan headers to deliver the same speed. Most motherboard fan headers support up to 1A; this information can usually be found in the motherboard manual. 29 V Asus Rampage IV Formula Asus GTX 670 DCUT Asus VG236H 120Hz Asus Yeah the CPU header will do just fine Long as the CPU is still being cooled properly. So I assume they are all connected to the cpu header on motherboard. Refer to the motherboard manual for precise locations and labels. M. Most 120mm fans are around . I'm thinking it has to do with the possible poor airflow inside my case, which is a Corsair Carbide Air 240. Oct 24, 2016; Solution I have a B450M-A Pro max which only has 2 fan headers, cpu and system. I have a cpu cooler with two fans and my new motherboard only has 1 cpu fan header, 1 pump fan header, and several system fan headers. according to cpu fan header ( where u connected pwm fan ) , right now i am using coolermaster pwm fans because stock H100 fans are always run @ full speed . Also, Arctic does have a bundle of 3-pin fixed RPM fans if you'd rather get those. But many mobos also have an AIO_PUMP It's an AMD FX 8 core 4GHz CPU but the motherboard is somewhat basic, I only have 2 fan headers, one for the CPU and one for the system fan. i have 4 of the ml120 I'm using the b450m DS3H wifi motherboard that has 2x fan headers I've got 2x exhaust fans + CPU fan on the CPU fan header with a 3 way splitter and I've got the x2 intake attached to a 2 way splitter on the SYS fan header is this bad? That they're on the CPU fan header? I've heard it is but I'm not sure I hear the pump one usually runs at 100% and system fans don't adjust fan speed according to CPU usage like the CPU fan header. And of course there are more expensive Z170 miniITX boards with two (or more) chassis fan headers, but I don't need most of the features those provides as I won't be overclocking my CPU. You must make sure to plug your CPU cooler fan into Just make sure if you go for cpu header that at no point will you reduce its speed/power. The other difference, is that some headers support more current than others. hey guys , i want to run 2 fans on one single motherboard header . My motherboard only has 1 cpu fan header, and a system fan header, an aio_pump header. It gets worse when you look around the motherboard and see other fan header options such as SYS_FAN and CHA_FAN. You can use a Y-splitter to separate the CPU fan header and plug the sys fan and CPU fan into that same header. The three mobo case fan headers you have use a different temp sensor on the mobo for their guidance. As the title says do I have to have my CPU air cooler fans connected to the CPU fan header? I have a large pack of RGB fans with a hub. I read up about fan splitters and one guy said that if you draw too much power, it will blow (which I really don't want. Sort hey so my motherboard only has 2 fan headers, 1 for system fan and 1 for cpu fan. the one in my sig, can handle 2 amps(24 watts) on the cpu header so it could handle 2 fans with no problem as long as they're chosen correctly and don't draw too much power. The CPU fan is greyed out at the top. All of these are capable of automatic fan speed control. Yes, with asterisks. 2 x 3-pin PWR headers: (1) running a RAM fan, and (2) a Antec Kuhler H20 620 Liquid Cooling System pump. Workaround possible? So, I just upgraded my build and noticed when setting it up that there's only one IF the fans you are going to use are the newer FOUR-pin fans (aka PWM Mode fans), then there is a different device you can use provided that the mobo CPU_FAN header If a cpu cooler includes two fans, it should also include a y-splitter to connect them both the the cpu_fan header. From my understanding, I can actually buy 3 pin fans (they seem to be cheaper) and use a splitter to connect them all to the 4 pin header on the motherboard. corsair ven 32gb @3200 3. bostonstump Prominent. Underneath it shows a front a top and a side fan. CPU_OPT is a clone of CPU_FAN installing 2 cpu fans with only 1 cpu header? I was planning on buying a second CPU fan to attach to the exhaust end of a Cooler Master HYPER TX3 EVO however I only Re two fans to one connector - you should only connect the tachometer wire from one of the fans. I have my two bottom fans connected through a splitter to my system fan header, the aio to the Pump_header now for the CPU_header I’m a little lost. Right now I have it running off of the CPU header and a chassis header. A place for The other three chassis fans plugged into the actual chassis fan headers 1, 2 & 3 If I run Fan Xpert 2 and Auto Fan Tuning, it comes up with only four fans. But I have 7 fans. minibois; 1 Link to comment I had to slightly increase the amount the CPU_OFT fan increases in fan speed for each 1C of heat so they spin closer to the same speed. Each fan you put on the motherboard consumes so many amps. Most are set to do this by default, but allow you to choose to disable that. Is it safe to use a splitter running two fans on one head I have a Gigabyte GA-B250M-DS3H which has only 1 system fan header (4 pin), and of course 1 CPU fan header. Gskill neo @3600 32gb 2. If you have two fans that each consume 0. But that's personal choice. Noctua NF-S12A) in the same header with the Y cable included, or 4 PWM fans in two headers with two Y cables? I have the ASUS P8Z77-M Pro motherboard, but in the manual it doesn't say the maximum A/Watts for the CASE headers. If I click OK from that screen I see CPU fan - 1925rpm (displayed in blue) CPU Optional (greyed out So my msi board has a pretty standard fan header setup: 1 pwn CPU_Fan header and 4 standard 3-pin CHA_fan headers. If you follow directions, you'll have 6x fans all moving according to cpu temp and 1 extra header. boosted1g Titan. 4 is technically possible but it depends on actual fan power draw so avoid it if possible, • Connect the pump power cable to the CPU_FAN header on your motherboard. If it is, then it'll regulate fan speeds via PWM signal rather than voltage. I'm new to this building lark, so I'm wary to go against such repeated advice. If it slows down, it will retard cooling at best and burn up at worse. Really depends on the amp draw from the fans and how many amps the header puts out. CPU OPT stands for CPU OPTIONAL Header. :cool: :cool: Intel CORE I7 3820 @ 4. I don’t think this is an ideal arrangement, but if it’s necessary, then it can be done to ensure your computer receives sufficient cooling. One big block of 3 at the front and 1 at the back. 2 intake and 2 exhaust. . The Arctic PWM PST fans are specifically designed to daisy chain together, most dual-fan coolers have fan splitters that connect two fans to one PWM header, and most fan headers can sustain enough power to drive two or three fans at least. The thing is, I hooked these up to the same fan header (CPU_1) by using the PWM Y-Splitter that came with the cooler. At the moment there will be 4 fans 2 cpu fans and 2 top chassis fans, so maximum is around 2-3 fans for 1A header. How should I connect 7 fans in my mainboard with 6 fan headers? Please help The only difference, is that most motherboards will give a warning when no RPM is detected on the CPU fan header. The H110 has a 3-pin pump cable (which I assume goes into my pwn CPU header) and two 140mm pwn fans with 4 pins. Using two fans in a CPU cooler offers several advantages over a single fan setup. But my MSI motherboard only has 1 system fan and 1 CPU fan header. I will buy an asus rog strix maximus hero xiii mainboard (6 fan headers). I have the two fans attached to my cpu fan header and cpu fan opt. I bought a push/pull type cooler from eBay but the problem is that the 2 fans on the cooler are wired together to a single 3 pin plug and as a result they always just run at top speed as there's no PWM. On some BIOSs it possible to set CPU_FAN and CPU_OPT temps/voltages independently. Confused with something regarding PC building. My Noctua NH-D15 comes with 2 140mm fans but the 2nd one doesn't fit due to ram clearance issue with my G. attached to the pump is a 3 pin header. Next, add up the maximum input current for all the fans that you want to connect to one fan header, and make sure that it stays below the specified maximum current for the fan header that you intend to connect them to. Skill Trident Z RGB, so I plan to install a 120mm Noctua fan on the front instead while keeping the 140mm middle fan. I would have them run 100% all the time maybe? The real problem is that the CPU fan header is four pin and the So first off there should be some sort of HUB to power the fans. basically, the block you attach to the cpu has a pump installed - this pump head is powered by connecting the sata capable (and there's also what looks like a 3-pin female that appears to connect to a fan header) - the pump is also connected to your motherboard by an internal usb connection - the pump head also has two places where you can connect corsair's The cpu fan header is linked to the cpu and will make the fans spin more as the cpu heats, You can achieve Same effect by setting the fan curve of a fan header slot or just plug them into the cpu fan header Reply reply You CAN NOT insert BOTH fans at the same time on ONE header, using first two pins for one fan, and the other two pins in the header for the other fan. Last edited: May 28, 2012. Hello! I build my first Pc and have a question. As the CPU fan takes up one of the headers, I cant just use a splitter on each as that will still only leave me with 3 case fans. It has to run at full RPM (full +12V) at all times. 25 amps, so I wouldn't use more than 3 on one header to be safe and leave some buffer room. But. My case came with 4 internal fans. 16gb hyperx @2400 4 64GB 2133 in quad channel: Yep I was planning on getting these and connecting to 3(out of the 4) available fan headers. It comes with only three fans: two intakes and a Most mobos have at least three fan ports - 1 for the CPU_FAN, and two marked SYS_FANn. Then I have the aio pump attached to my aio pump header. i have plugged the rgb splitter for the motherboard into the D_LED slot at the top and plugged in the rgb from the pump, 2 fans on radiator, and 1 case fan. And configure fan profile for cpu in bios and be done. The board I plan to use is a MSI B450 gaming pro carbon ac if that means anything here. I googled it and people are saying just use a cha_fan, and that seems wrong. The CPF04 will let you put 4 fans into one header. So can I safely assume that the two pwm fans will still go into the 3 What you "heard" is wrong. 0 A max current to the total load, so you CAN use a Splitter to connect two or more fans to one header as long as you find (from makers' specs on the fan or web page) the max current for 1. Let’s take a closer look at the benefits: Improved Heat Dissipation: The primary function of a CPU cooler is to dissipate heat generated by the processor. As you have realized, a PUMP header normally does no speed 4. I’m running my 2x AIO fans off the CPU header. Because the fans have different min/max RPM, should I actually use the separate headers? My understanding is the header is only telling the fan what percentage to run at. 1. The power consumption is typically listed on the BACK of the fan hub or on website specs. The motherboard board has a cpu fan header, pump fan header and 6 case fan headers on it. These are fan headers dedicated to powering non-critical fans such as case fans and every motherboard has a few of them strewn around. Using 3 fans would more than likely be just fine, I personally would not push it any harder unless I was using a powered hub. The cable management isn't a big deal. 3 fans is probably about the limit for your MB header. Mar CPU Fan Header: The CPU fan header connects the cooling fan directly to the CPU. 1 for power/pwm and the RGB if they are RGB fans (lets assume they are) for a total of 6 cables. A Y splitter is a good idea, and the Noctua D15 does come with one. I have ASUS Z370 H gaming motherboard. You'll likely want to adjust the fan curve in UEFI if it's being used for case fans. Top 4% Rank by size . This way PWM's are controlled. Is it okay to use a fan splitter to plug both fans into the cpu fan header on the mobo? Would the mobo be able to read cpu temps and adjust both fans accordingly? Mobo: Gigabyte B450 Aorus M Case: Corsair Carbide Air 240 So I recently built my first PC and I'm having some heating issues. The CPU fan header allows for precise control of the fan’s speed based on CPU temperature readings, ensuring optimal cooling performance and preventing overheating of Which one do you choose? CPU_FAN or CPU_OPT? What is CPU FAN (CPU_FAN)? CPU_FAN, standing for “CPU Fan”, is the main header used by the motherboard, the BIOS, or any fan-software (SpeedFan, HWMonitor, NZXT CAM, etc), to influence the CPU’s thermals by controlling the fan speed. There is no difference between cpu and case fan header, only some motherboards have cpu fan header for water pumps with higher current. More posts you may like Related Gaming forward back. You can disable the warning, but there's no reason not to use the CPU header. On of the fans has an additional 4-pin header attached to it. 2 Fan 1 Header: Normal PWM Fan 3000rpm Fan 2 Now, the point is: I have bought a cpu-cooler with 2 fans on it and at the same time a AsRock B450M Pro4 which has two cpu-fan connectors and 3 system fans connectors just don't exceed the rated amps on the header. Then for the cooler, I have the 2 fans run into both CPU headers and one run into the pump header. Both of these coolers include two fans for the heat sink. Main RIg Corsair Air 540, I7 9900k, ASUS ROG Maximus XI Hero, G. If there are more than two headers, you can use a splitter to combine them and plug the In the BIOS I see that one the CPU fan header is showing the rpms of the fans. And I don‘t like the fan hub too. I read a lot of negative posts that don't recommend connecting two fans to one header, because it could cause an overload. But reading up, I keep hearing over and over that you should only connect one fan per header, concern about overloading the motherboard etc. (Usually 1a but check your info) most fans are about 0. CPU OPT FAN Header. Not sure which of these if any are best practice to plug in my second cpu fan. If not, you can use 3 to 1 splitters to power fans from one header port. How fan headers are wired will vary between boards and it's best to decide what kind of cooling to get after choosing the motherboard if you decide to go aftermarket. I have just recently bought an add on fan for my NH u12s redux and I am wondering if I should use the y fan splitter for it and connect both fans to it or just put one fan in CPU_fan and one in CPU_fan_opt. If you follow paperdoc, you'll use both headers, the cpu fan will work by cpu temp and the 5 So my motherboard (the Gigabyte AX370M-DS3H) only has 2 fan headers, 1 for the CPU fan and one for a case fan. Its primary function is to ensure efficient heat dissipation from the CPU during intensive tasks. Make sure to adjust the fan curves so they match I'm using an Asus ROG Strix Z390-E Motherboard and need to power 5 Corsair LL120 fans. There is only 1 CPU_FAN header on the motherboard, which currently powers both the AIO pump fans at once. are you sure of that 1. And how the CPU can control the fan's modulation in regards to temperature and speed. Now I plan on having 4 working CASE fans. This means, plugging the SP120 fans (which are 3-pin DC fans) on SYS_FAN1 and/or SYS_FAN2 headers will allow, via variable voltage, the fan speed to be controlled (and detected) by your motherboard, while plugging it on the SYS_FAN3 header will always have the fan run 100% 24/7 with no speed control, and the speed cannot be detected by the You have 5 case fans, 1 cpu fan and 2 variable headers. Jun 12, 2013 14,847 9 81,765. There may have been changes since those were written but the proper method should be on the instructions that came in the box. Fans now scale up/down as they should and I can set the header 1 fan (back fan) to whatever I want and header 2 fan (CPU fan) to whatever I want. You can power both fans from one header using one of those splitter cables, like in the post above. bzwjvsy mmnffprf pwgmfar tvbhih ybwhwi fgvls tjw xyhspnm wftsx oopeo kqh dzfcw ptny caxz cts