Fan Headers not working

[Slurpee12]

I recently built a computer for my friend. His tower is an AZZA GT1, CPU is an i5-4690k, 800 watt PSU, mobo is Gigabyte G1 Gaming, and CPU cooler is a Corsair H80i GT. The CPU cooler comes with a y split cable, where you plug in the radiator fans. This connects to the pump, and the pump connects to the the CPU fan header. The mobo has a total of 6 fan headers. All six fan headers need to be occupied. However, it seems that the board is not receiving enough power or it is not distributing enough power. The case came with 4 fans, and we got an additional 4 fans. Four of the fans are a 3 fan header. Before these fans were installed, the other 4 fans (2 were fan headers) and the CPU cooler worked fine. Everything was running; however, with the new fans things started to go wrong.
With the installation of the four fans, one fan (140mm intake) and the back CPU fan cooler were not spinning. Immediately, we checked if everything was connected - it was. Then, we unplugged the CPU fans from the y splitter and used a 3/4 pin adapter to plug into molex. The fans started spinning; however, the bottom fan still did not spin. We moved the computer to his room (a different outlet and a circuit in the house) and the CPU fan and bottom fan did not spin. When the CPU fans are connected to the y splitter, neither spin and the bottom fan does not spin either. It seems that they're not getting enough power because the fans will spin up, slow down, spin up, slow down, then stop spinning. Therefore, these fans are spinning and are getting power, but it just seems like it's not getting enough.
What is going on here? I've exhausted all of my troubleshooting abilities.

 

[Shneiky]

You are trying to run a 80i with 2 fans and a pump and 8 case fans. Keep in mind - some fan headers are rated for 1 amp (Like the main CPU_FAN header) while the others are rated at 0.5 amps. Check your motherboard manual to determine which header supports what amps. You are definitely stressing the headers too much.

Best is if you buy a cable splitter with a molex/sata end and a PWM / 3 Pin lead that connects to the motherboard. An example:

http://www.scan.co.uk/products/45cm-akasa-flexa-fp5-pwm-5-fan-splitter-black-braided-cable-powered-via-4-pin-molex

http://www.amazon.com/Phobya-3-Pin-Cable-Splitter-Connection/dp/B00414ROMS/ref=pd_sim_147_6?ie=UTF8&dpID=31Olie3Cb0L&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1SSG1PQF1YW56JH83TVH

You can use a PWM fan splitter for the PWM fans and 3pin fan splitter for the 3pin fans and connect them directly to the PSU, while still controlling their speed from the BIOS.

Another possibility is to use an internal fan hub. Such hubs are made by Phanteks, NZXT and other brands. You need to check for yourself what fans, what headers do they have and what RPM they run at. Keep in mind - a splitter only splits - it does not control each fan individually. Example - if you have a 600-800 and a 800-1500 RPM fans connected on 1 splitter and you put them at 7 volts - they will run at 700 and 1200 rpm respectively (this is just a theoretical example, RPMs vary per fan models and manufacturers)

 

[Slurpee12]

You are trying to run a 80i with 2 fans and a pump and 8 case fans. Keep in mind - some fan headers are rated for 1 amp (Like the main CPU_FAN header) while the others are rated at 0.5 amps. Check your motherboard manual to determine which header supports what amps. You are definitely stressing the headers too much.

Best is if you buy a cable splitter with a molex/sata end and a PWM / 3 Pin lead that connects to the motherboard. An example:

http://www.scan.co.uk/products/45cm-akasa-flexa-fp5-pwm-5-fan-splitter-black-braided-cable-powered-via-4-pin-molex

http://www.amazon.com/Phobya-3-Pin-Cable-Splitter-Connection/dp/B00414ROMS/ref=pd_sim_147_6?ie=UTF8&dpID=31Olie3Cb0L&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1SSG1PQF1YW56JH83TVH

You can use a PWM fan splitter for the PWM fans and 3pin fan splitter for the 3pin fans and connect them directly to the PSU, while still controlling their speed from the BIOS.

Another possibility is to use an internal fan hub. Such hubs are made by Phanteks, NZXT and other brands. You need to check for yourself what fans, what headers do they have and what RPM they run at. Keep in mind - a splitter only splits - it does not control each fan individually. Example - if you have a 600-800 and a 800-1500 RPM fans connected on 1 splitter and you put them at 7 volts - they will run at 700 and 1200 rpm respectively (this is just a theoretical example, RPMs vary per fan models and manufacturers)

In my own system, I have an H80i GT that's plugged into the CPU_FAN header and I haven't had any issues. I have the same amount of fans, plus an additional 200mm fan, so 9 fans. All of my fans spin, but I only have 2 fans that use headers. The rest are molex. He has 6 fans that are headers and 2 fans that are molex. I'm really thinking that the motherboard isn't able to divert enough power to each fan.

 

[Shneiky]

As I told you - you are overdrawing one fan header. If it is a 0,5 amp header with fans that draw like 0.2 amps each - it is too much electricity for the header to provide. The motherboard is protecting itself. Not to mention you are forgetting the H80i - the pump has quite high amp draw.

In your system you are using 2 fans on a header and the rest are molex. Of course you are not going to have problems.

You are blaming the motherboard, but what you need to do is get back to the motherboard manual, check the fan headers, check the amp draw of your fans and put things properly.

 

[Slurpee12]

As I told you - you are overdrawing one fan header. If it is a 0,5 amp header with fans that draw like 0.2 amps each - it is too much electricity for the header to provide. The motherboard is protecting itself. Not to mention you are forgetting the H80i - the pump has quite high amp draw.

In your system you are using 2 fans on a header and the rest are molex. Of course you are not going to have problems.

You are blaming the motherboard, but what you need to do is get back to the motherboard manual, check the fan headers, check the amp draw of your fans and put things properly.

So then my question is, why would the pump have a design that causes the header to overdraw power? The H80i's design calls for you to plug in the two radiator fans into the y splitter cable, and then plug the pump + fans into the CPU_FAN header. This is the only way to create a cooling curve with the product, something that is advertised. If this design is overdrawing power, what is the purpose of the y splitter? By converting the other case fans to molex, would this solve the issue, as in what my system has? If so, wouldn't the header still be overdrawing power? Or would it not because the other headers are not occupied so it can put more power through a single header?

 

[Shneiky]

Why don't we take a step back and you describe all the fans - their models and brands and how much amps do they pull. Then describe where and how have you plugged them. Like this and this fan in SYS_FAN5 for example and so on.

You are jumping immediately to applying a solution without sharing all the information so we can identify the problem.

"8 fans" and "bottom fan" are just so abstract.