R9 290 making CPU overheat

[Demosthenest]

This are my specs:
i5 2300
r9 290 gigabyte 3x windforce
Define r4
1 140mm intake fan in the front
1 120mm exhaust in the rear
Cooler master 212 evo
Idle temps are fine (35-40 degrees CPU, 50 degrees gpu) but when I'm playing some games it all gets pretty noisy fairly quickly and the gpu rises up to about 85 degrees, which I understand is normal with this card. The CPU then starts rising in about an hour or so up to 65-70 degrees.
I guess there's not enough airflow in the case. Could you guys recommend a better configuration (fan-wise) and some decent fans? I do not wish to spend too much on this, tbh.
I was also thinking about downclocking the card or capping it at some point, I would rather have less performance and less heat.

 

[techgeek]

How is your cabling? Do you have lots of obstruction to airflow from front to rear? Sometimes all that's needed is to tidy up your cabling to eliminate airflow restrictions. Unfortunately cards like the windforce (and really any non-blower style cooler equipped GPU) dumps most of it's waste heat inside the case.

If cabling isn't the problem, then I would look at adding more fans. Your case has plenty of options for adding fans. I might start with adding exhaust fans to the top locations. This should help get the hot air out of your case. Then I would consider an intake fan at the bottom of the case or the side.

Obviously the one thing I would check is the cleanliness of the Hyper 212 EVO, make sure all the dust has been blown out of it. I know that most likely you've already done this, but I couldn't make a suggestion without at least mentioning the basics.

 

[RababNoor]

Set
*2 140mm Intake fans in Front
*1 120mm Intake fans in Bottom
*1 120mm Exhaust fans in Rear
*2 140mm Exhaust fans in Top
*Re Thermal Paste in your CPU
*Do a Proper Cable Management [so the System get Enough Airflow]

 

[Demosthenest]

Cable management is not the issue and neither is dust, I've already checked. My question was more towards a recommendation on which fans to use and on which positions, some budget-friendly options for fans.

 

[techgeek]

Well as far as budget friendly fans, Corsair SP and AF series are pretty good. Whether they are budget friendly or not is up to you. They are more expensive than some, but cheaper that Noctua. I would suggest 140mm fans over 120mm if you like quiet while still getting airflow. There are the Quiet edition as well as the High Performance editions. Of course the difference between these should be obvious.

I prefer bottom fans over side fans. Side fans are a pain in the a$$ when taking the side off of your case. They also often cause problems if you have a tall heatsink. However bottom fans have a tendency to suck up dust especially if your PC is on carpet. I really like top mounted fans, they are excellent at exhausting hot air from your case particularly if you are having issues with your CPU heating up. Since most rear fans are at the same level as the CPU HSF, you often have a dead zone of air sitting at the top of the case. This air will slowly move out through the top vents without fans, but not quick enough. The result is that it heats up the CPU HSF.

My preference has always been positive air pressure inside the case. This means more intake than exhaust. However since your case options lean towards negative air pressure (if you don't use the side fan option) I would use a higher speed fan at the bottom, and lower speed fans at the top. At least this way you have a chance at the very least a neutral air pressure scenario.

 

[RababNoor]

Buy 3 140mm & 1 120mm fans of
Corsair Air Series AF Series or Noctua NF-F Series.
[Fan position already mentioned]

If you are on Tight Budget
Then Choose Cooler Master Blade Master Series or Cooler Master JetFlo Series