A very strange thing with newly-installed fans

[neomar21]

Good Evening. This is my first post here and my english is not perfect, so i apologise if i have made many mistakes.
I've had a new configuration for about a month. The specs are:
Core i5-4460 /
Powercolor R9 290 TurboDuo /
ASROCK B85 PRO4 / 2x4GB A-DATA 1600MHz /
1000GB Seagate SATA 3 7200 64M /
Fortron Rider S 750 /
CM Elite 334U /

My Processor doesn't increase over 60C, but my graphic card goes up to 75-76 while playing 1 hour "Far Cry 3" for example.
I Know that these temperatures are not bad at all, but I decided that i want to make them lower, especially the Graphic card.

So, as you can see, my case has a stock rear exhaust fan, and 2 holes for fans on the side panel, 1 hole for a fan at the bottom and a hole in front of the case.

I decided to buy 2 "3-pin" fans like these : http://www.arctic.ac/eu_en/arctic-f12-tc.html
They have temperature sensors, so i put the first sensor near the processor, and the second sensor lying on top of the graphic card.
I connected the first one in the "CHA-FAN" and the second one in the "CPU FAN" section in the motherboard, because these are the only possibilities.

I mounted them on the two holes on the side panel, both pushing air into the case.
And when i started playing games, i expected sudden temperature drop, but unfortunately that;s not what happened: After 30 minutes of playing "Far Cry 3" the temperature of the GPU went to 85C. That is a mistery to me.

What is wrong, guys ?

 

[i7Baby]

Get rid of those two fans. Just use a custom fan profile on MSI Afterburner to bring down your GPU temps.

 

[bystander]

Proper placement and fan direction is needed for the fans to be of use. You also have to realize that you place the fans on the CPU sensors, so they won't ramp up from GPU need. You may have directed air away from your GPU's, causing the temps to go up.

 

[Darkbreeze]

Your motherboard has two CPU fan connectors, two PWM case fan connectors and one three pin case fan connector. The motherboard has it's own temp sensors for motherboard and cpu temperatures. The setup you should have configured with the number of headers you have, and does not include the use of fans with their own sensors, is the rear fan on the CPU OPT header, two case fans on the two four pin connectors (You can also use three pin fans on these headers) and one case fan on the other three pin connector.

I would get the correct type of fans, and utilize those motherboard connections and control the cooling from the BIOS, not use sensor style fans.

With normal fans you want the CPU cooler fan connected to the CPU FAN header. The rear fan connected to the CPU OPT header. And any remaining fans to the other motherboard headers. If you have a case fan connected to the primary CPU FAN header, that's a problem.

 

[neomar21]

Here is a photo, displaying where the two fans are connected. Its not the primary CPU-FAN I think, It's the primary CPU FAN, the upper fan is connected to the CPU FAN 2 and the lower fan is connected to the CHA FAN 2 ." The fans have their own temperature sensor, because I think they can't be controlled by a software.

Here are some other photos:
1 2

 

[bystander]

Here is a photo, displaying where the two fans are connected. Its not the primary CPU-FAN I think, It's the primary CPU FAN, the upper fan is connected to the CPU FAN 2 and the lower fan is connected to the CHA FAN 2 ." The fans have their own temperature sensor, because I think they can't be controlled by a software.

Here are some other photos:
1 2

CPU and CPU2 will still control based on CPU temps. One of those appears to be a case fan, which would go off of ambient temps in the case, where ever that sensor is.

 

[neomar21]

Here is a photo, displaying where the two fans are connected. Its not the primary CPU-FAN I think, It's the primary CPU FAN, the upper fan is connected to the CPU FAN 2 and the lower fan is connected to the CHA FAN 2 ." The fans have their own temperature sensor, because I think they can't be controlled by a software.

Here are some other photos:
1 2

CPU and CPU2 will still control based on CPU temps. One of those appears to be a case fan, which would go off of ambient temps in the case, where ever that sensor is.

So what is the best thing I can do in order to reduce the temperatures if we consider that buying new fans is not an option.

 

[bystander]

What temps are you trying to lower, the GPU? What does the side panel of the case look like? You might get improved temps for the GPU placing a fan facing the video card. If it does, you should try turning the fans as push or pull to see which works best.