Help me find what's wrong with my case airflow, please!

[RayZ]

Hakuna Matata, friends.

I need some advice regarding my case airflow, which is CoolerMaster Cosmos 2. 

I feel like it's airflow is somewhat faulty (?). actually, I'm not sure - I know this case to be a very cool.
Anyway, the CPU temps (6700K + Corsair H110i GTX, overclocked to 4.7) seems to be pretty much fine and more (30 idle, 60-70 load),
but my GPU, 780 Ti (Reference) temps are skyrocket to 90c-ish (Overclocked, stock voltages). well cleaned and I replaced it's thermal-paste with a new one (MX-4) not long ago.
 

Anyway, this picture I made is showing my current airflow:

 

My case door is always open, for now. I'm modding it for a window this days (almost finish). so there's that fact too...

Here is how I planned to improve the airflow:
by the way, this case has a fan controller, and I also have another one on the bays - so i'll be just okay with any high loudy RPM fan.

A- replacing the front 700rpm one with a higher rpm one (I have one in my old CM HAF X, currently not in use)
B- adding another front 120mm fan below the primary (Enermax Vegas, 1200 rpm) - ready room for one on the case
C- adding two Noctua NF-F12 industrial fans on the door (ready rooms) as intake, to pull as much air as possible for the GPU
D- relocating the back 1200rpm 140mm coolermaster fan to be placed on\after the HDD cage, Intake, to help the air come through (ready room on the case)

The missing back one will be replaced with another Enermax Vegas, and the ones on top staying as is - I've been reading that they are good enough, and the H110i GTX -MUST- use an intake fans on top of the radiator.

Another picture with the improvments for instanse:


 

So, yep.
What do you think would be the best to do?
does my intended improvments will do any good? (maybe not enough air pulled out?)

 

Please give me your advice, and sorry for my grammers - i'm a very quick "typer"....
Many thanks!

[PokeCatz]

Wait, how are they Noctua's being mounted?

[HPWebcamAble]

8 minutes ago, PokeCatz said:

Wait, how are they Noctua's being mounted?

On the side panel, which is currently not installed

(I assume)

[PokeCatz]

1 minute ago, HPWebcamAble said:

On the side panel, which is currently not installed

(I assume)

That makes a lot more sense. Thx.

[RayZ]

What he says.

[stconquest]

Exhaust the top.

[RayZ]

As I were saying, the H110i GTX needs his intakes. the manual says so.

[stconquest]

2 minutes ago, RayZ said:

As I were saying, the H110i GTX needs his intakes. the manual says so.

lolwut?

[RayZ]

H110i GTX needs to draw an air from the top in order to function properly. so exhausting the top might be a very bad idea.

[LogicalDrm]

1 hour ago, RayZ said:

H110i GTX needs to draw an air from the top in order to function properly. so exhausting the top might be a very bad idea.

It doesn't need to intake. Even manual gives conflicting info where text says that you achieve best performance as intake (which is correct) and picture shows fans as exhausts (which is more common and would be better for your situation). You could use rear fan with filter as intake if temps are issue, which I doubt.

 

As for GPU, what temps you get with stock clocks and what software/games give you 90C+ temps?

 

[RayZ]

Thanks for the heads up.

Games are giving me about 85c, any modern game. benchmarks (valley, for instanse) are caps on 90c. well, when not overclocked the temp seems to cap on 84-85c. but with stock temps this card has to be overclocked without having to worry about temps (so it seems on the reviews), so what the actual hell.

[stconquest]

42 minutes ago, RayZ said:

Thanks for the heads up.

Games are giving me about 85c, any modern game. benchmarks (valley, for instanse) are caps on 90c. well, when not overclocked the temp seems to cap on 84-85c. but with stock temps this card has to be overclocked without having to worry about temps (so it seems on the reviews), so what the actual hell.

Look:  You have a reference card which are among the worst for cooling.  You also have terrible airflow as almost everything is pushing air in and the hot air has to find it's own way out.

 

Switching the rad fans to exhaust will exchange the air inside the case much faster.  Please do not spout the crap about rad fans needing to be intakes. 

[RayZ]

I'll check on that... I just don't want to ruin the CPU low temps only for the GPU to be cooler...

Is there another way?
what about a very fast RPM fan in the back? (like - if all the intake ones will be slower, and this one will be faster, It would be able to keep through?)

[stconquest]

24 minutes ago, RayZ said:

I'll check on that... I just don't want to ruin the CPU low temps only for the GPU to be cooler...

Is there another way?
what about a very fast RPM fan in the back? (like - if all the intake ones will be slower, and this one will be faster, It would be able to keep through?)

Wow... just wow...

 

These are fans.... you flip them and check the temps.  If you do not like the change, flip them back.  Is this really a difficult concept?  Really?

[RayZ]

Your atitude is uncalled for, mate. if you don't want to help, then don't...

 

I can and I will try to change it. but I'm looking for alternatives in case it won't work well.

[stconquest]

5 minutes ago, RayZ said:

Your atitude is uncalled for, mate. if you don't want to help, then don't...

 

I can and I will try to change it. but I'm looking for alternatives in case it won't work well.

I don't mean to offend.  My problem is with your lack of scientific curiosity.  You have the opportunity to experiment with a simple design feature given you have so many freaking fans at your disposal.  Your unfounded fears are disheartening. 

 

@RayZ  If you truly want the 240mm rad as an intake, move it to the front and have the 200mm mounted to the top as an exhaust.  If there are no mounting holes for the 200mm in the top, get creative.

[LogicalDrm]

14 hours ago, RayZ said:

I'll check on that... I just don't want to ruin the CPU low temps only for the GPU to be cooler...

Is there another way?
what about a very fast RPM fan in the back? (like - if all the intake ones will be slower, and this one will be faster, It would be able to keep through?)

Difference for CPU temps should be really minimal, under 10C definitely and most likely only few degrees. Does 67C max temp instead of 62C sound that bad for you? If you can have better GPU temps? As for GPU temps in general. Like said, you are OCing with stock cooled card. I don't know what did you expect. GPUs react more aggressively to upping clocks in terms of temps than CPUs. Last time I did OC current card, only 100MHz up gave me 5C more on max temps (and this is open-air cooled).

[ThomasD]

On 5/24/2016 at 4:21 AM, LoGiCalDrm said:

It doesn't need to intake. Even manual gives conflicting info where text says that you achieve best performance as intake (which is correct) and picture shows fans as exhausts (which is more common and would be better for your situation). You could use rear fan with filter as intake if temps are issue, which I doubt.

 

As for GPU, what temps you get with stock clocks and what software/games give you 90C+ temps?

 

This.

 

Radiators do not need to be intakes.  But that is the best way for the manual writer to guarantee that the radiator sees a supply of cool air.  No radiator works well when fed hot air.

 

But, so long as you have good airflow through the case a radiator will work just fine as an exhaust.

 

Personally I like them as top exhausts.

 

Edit:  My older son's Air 540/4790k/GTX 970 has an H110 in exhaust mode, and my Phantom 820/4790k/R9 390 has an H110i in exhaust and both have excellent temps -idles darn near ambient and AIDA loads in the 60's.

 

And as noted above, it is important to remember that GPU coolers are built to fit in a relatively small package, so do not have much reserve capacity to dissipate added heat.  Even small increases in GPU performance will lead to rapid temperature rise.  The only ways to fight this are massive supplies of cool air or an aftermarket cooling system.