plz reply this is my second thread because of no reply

[Vinu_1]

my cpu fan is connected on system fan port and my cpu fan port is empty.... no issues till now, no warnings...my overall computer running cool with single fan .but is it wrong or cause bad to cpu.everyone say the draw different speeds.i am noobie
by the way my cpu fan with heat sync have 4 wires which is connected in a system fan port

here is the whole layout of my mother board
http://www.ecs.com.tw/ECSWebSite/images/Products/large/H81H3-I_V1_HDMI_LGA_1150_Intel_Motherboard_2.1.jpg
http://www.ecs.com.tw/ECSWebSite/images/Products/large/H81H3-I_V1_HDMI_LGA_1150_Intel_Motherboard_3.1.jpg

the two four pin headers above and below of sata port is cpu fan header and system fan header
the one close to cpu is the system fan header

 

[CountMike]

Why on SYS_FAN ???
CPU cooler fan should be on CPU_FAN header to control the fan's speed according to CPU temperature. There's also a sensor to warn you if fan fails and that doesn't happen with other fans. If fan was to fail your CPU may burn out.

 

[BadActor]

Probably not a problem since you've been using it that way. Some motherboards will shut down the PC if they sense the CPU fan isn't running (by not being plugged into the CPU fan header). You may also be running the fan at full speed rather than on a profile. Connecting it to the correct header only takes a second, why not change it?

 

[Vinu_1]

can i change it? will it cause bsod or bad sound from fan or any warning?
cause i dont have any of them right now .its been default like this

 

[CountMike]

Of course it can be changed and it should be changed. Just do it with computer OFF.

 

[BadActor]

Won't be a problem. Turn off the PC and swap the connector over. Be careful not to disturb other wiring or the CPU cooler itself.

 

[Vinu_1]

oh my god i coouldnt replace the fan because the wire too short to reach i am helpless
this is my fan position
http://tinypic.com/r/jickdu/9
i arranged one system fan to be near like this
http://tinypic.com/r/2zgewdi/9
will it do any help?
i am feared help me

 

[CountMike]

But that looks like CPU cooler fan, at least as much as I can see on those pictures. If it really is, it can be turned so wires can reach to CPU fan header.

 

[Vinu_1]

But that looks like CPU cooler fan, at least as much as I can see on those pictures. If it really is, it can be turned so wires can reach to CPU fan header.

i have 2 cpu fan one inbuilt from my pc in first image
second image the closest fan is intel pentium fan removed from older mother board it have long wire so i fixed it in side air cabin like this inverse t shape
http://tinypic.com/r/2hxrrlw/9

 

[777sevy]

The fan that's actually on your CPU, and cooling it, should be connected to the CPU fan header. Just turn the cooler closer to the CPU fan header, if the wire is too short. I'm assuming the second CPU fan is being used as extra cooling for your case? If so, then it's OK to connect this fan to a regular system fan header.

 

[Vinu_1]

The fan that's actually on your CPU, and cooling it, should be connected to the CPU fan header. Just turn the cooler closer to the CPU fan header, if the wire is too short. I'm assuming the second CPU fan is being used as extra cooling for your case? If so, then it's OK to connect this fan to a regular system fan header.

the real problem is the cpu fan cool wire is too short and system fan header is close to it .I think thats why they left it connected in the system fan as inbuilt settings.no matter how hard i try the cpu fan header is top of mobo and my cpu cooler cant reach it .tooo short wire.I let it be stay in the place which it was and connect an extra old cpu cooler to cpu header and used in side of cabin in helping in exhausting.
http://tinypic.com/r/2hxrrlw/9
my real question is i couldnt change the headers so if the cpu in load producing more heat will this two fans combine together to reduce the heat or temperature without frying it up.

 

[777sevy]

The fan that's actually on your CPU, and cooling it, should be connected to the CPU fan header. Just turn the cooler closer to the CPU fan header, if the wire is too short. I'm assuming the second CPU fan is being used as extra cooling for your case? If so, then it's OK to connect this fan to a regular system fan header.

the real problem is the cpu fan cool wire is too short and system fan header is close to it .I think thats why they left it connected in the system fan as inbuilt settings.no matter how hard i try the cpu fan header is top of mobo and my cpu cooler cant reach it .tooo short wire.I let it be stay in the place which it was and connect an extra old cpu cooler to cpu header and used in side of cabin in helping in exhausting.
http://tinypic.com/r/2hxrrlw/9
my real question is i couldnt change the headers so if the cpu in load producing more heat will this two fans combine together to reduce the heat or temperature without frying it up.

Just buy a PWM fan extension cable. Very cheap to buy and should solve your problem.

 

[scuzzycard]

Technically, all the fans should increase in speed with CPU temperature, regardless of which header they are plugged into. As long as your temperatures are within normal limits, it will continue run just fine if you leave it the way it is. The only real problem is that your motherboard's BIOS is programmed to give you an error message if the CPU fan fails. The way you have it wired, it will give the message "CPU fan failure" when your system fan fails, not your CPU fan. That's not as bad as it sounds, since the CPU has built-in thermal protection, and would automatically shut itself down before it overheated to a temperature that would destroy it. The error message would, however, make diagnosing the issue much easier for you if the fan stops working. Like one of the other responders said, you should get a PWM fan extension cable if you wish to correct this, but the situation is not urgent at all.

 

[Vinu_1]

Technically, all the fans should increase in speed with CPU temperature, regardless of which header they are plugged into. As long as your temperatures are within normal limits, it will continue run just fine if you leave it the way it is. The only real problem is that your motherboard's BIOS is programmed to give you an error message if the CPU fan fails. The way you have it wired, it will give the message "CPU fan failure" when your system fan fails, not your CPU fan. That's not as bad as it sounds, since the CPU has built-in thermal protection, and would automatically shut itself down before it overheated to a temperature that would destroy it. The error message would, however, make diagnosing the issue much easier for you if the fan stops working. Like one of the other responders said, you should get a PWM fan extension cable if you wish to correct this, but the situation is not urgent at all.

so i dont wanna worry about it anymore right ,thanks friend. can i remove the extra fan i connected or let it stay there.by the way what is pwm fan.inteernet says all the four pin headers connected are pwm fan and it can itself adjusted to the temperature.bothof my headers cpu fan and system fan have 4 pin header.then can they itself adjust according to the temperature?if yes then there would be no defference other than warning of failure right?
sorry for being such a noobie

 

[scuzzycard]

You could let the extra fan stay of course - but I can't really tell where it's mounted from that picture.