Question 1500 RPM 25 CFM or 1800 RPM 56 CFM

[Closery]

Hi folks,
I have a little question, this is my current fan setup:

My Build:
CPU: i5-6600k
GPU: Msi GTX 970 Gaming 4G
Mobo: Msi Z170a Gaming M3
RAM: Corsair 16 GB 3000mhz
Case: Aerocool Aero 800

After long gaming sessions, if I check my inner case temprature with my hand 😀 it feels kinda hot and my GPU temp feels little higher than it should be (Msi GTX 970 Gaming 4G - about 80-84 celcius, changed thermal paste almost 1 year ago with arctic mx4)
So I think my exhaust fans (1-2) are really bad and I'm planing to buy new ones and I couldn't choose between Aerocool Force Series PWM 12CM and Arctic P12 PWM PST 12CM

As for product specs:
Arctic P12 -> 1800 RPM with 56 CFM -- 1x price is 92 ₺ (Turkish Lira)
Aerocool FS -> 1500 RPM with 25 CFM -- 1x price is 38 ₺ (Turkish Lira)

What do you guys think should I buy for my exhaust fans, did they really have noticable difference?
Thank you for time

 

[Lutfij]

If your top mounted fans have a dust filter covering the allocated exhaust on the top of the case, then remove that and see if your temps improve. Often times, people create problems that can easily be solved by removing one or more additional component, as opposed to buying more components.

Also, you should be looking at the same brand of fans for all your fan mounting locations and then have them paired to a PWM fan hub like the one Phanteks, Swiftech, Silverstone or CoolerMaster make.

Your post is also devoid of critical information, what are the specs to your current build? What are your ambient room air temps?

 

[CountMike]

Hi folks,
I have a little question, this is my current fan setup:

After long gaming sessions, if I check my inner case temprature with my hand 😀 it feels kinda hot and my GPU temp feels little higher than it should be (Msi GTX 970 Gaming 4G - about 80-84 celcius, changed thermal paste almost 1 year ago with arctic mx4)
So I think my exhaust fans (1-2) are really bad and I'm planing to buy new ones and I couldn't choose between Aerocool Force Series PWM 12CM and Arctic P12 PWM PST 12CM

As for product specs:
Arctic P12 -> 1800 RPM with 56 CFM -- 1x price is 92 ₺ (Turkish Lira)
Aerocool FS -> 1500 RPM with 25 CFM -- 1x price is 38 ₺ (Turkish Lira)

What do you guys think should I buy for my exhaust fans, did they really have noticable difference?
Thank you for time

CFM is measure of amount of air it can push so it's more important than RPM but higher RPM may also mean more noise.

 

[Closery]

If your top mounted fans have a dust filter covering the allocated exhaust on the top of the case, then remove that and see if your temps improve. Often times, people create problems that can easily be solved by removing one or more additional component, as opposed to buying more components.

Also, you should be looking at the same brand of fans for all your fan mounting locations and then have them paired to a PWM fan hub like the one Phanteks, Swiftech, Silverstone or CoolerMaster make.

Your post is also devoid of critical information, what are the specs to your current build? What are your ambient room air temps?

Hi again, first of all thanks for help, sorry for misinformation, my build is;
CPU: i5-6600k
GPU: Msi GTX 970 Gaming 4G
Mobo: Msi Z170a Gaming M3
RAM: Corsair 16 GB 3000mhz
Case: Aerocool Aero 800

PWM Hubs like SilverStone SST-CPF04 is about 200 ₺(Turkish Lira) its kinda too much thanks to bad economy of my country :// (when I build my system 5 years ago 1$ was equal to 2 TL but now 1$ = 7.5 TL) and also my mobo has 3 System Fan port with PWM so I will connect them to these ports and configure with software.
Also I tried to remove dust filter but I doesn't change much, I guess my current two fans are really bad to push air, if I check with my hand I can't feel to much air. (I don't know exact room temps but probably like 18-20 celsius)

CFM is measure of amount of air it can push so it's more important than RPM but higher RPM may also mean more noise.

Yeah I research CFM a little bit and I know higher RPM mean more noise but I will configure them with pwm to work in low rpm while idling, I just need them when I playing games especially with OC and I have headphones so noise is not a problem while gaming.

I just wonder how 1500 RPM fan has 25 CFM and 1800 RPM fan has 56 CFM, does 300 more RPM make that or like the fan design make that?
Does it really worth the price when you think of them like Aerocool(25cfm) 38 $ (2x 76), Arctic(56cfm) 92 $ should I pay for 92 (2x = 185) to Arctic?
If that Arctic fan make real difference to that Aerocool like 50% better, I can buy them but if they make a difference like 10-20% its not worth it for that price I guess. (when I look at RPM difference, it is like 10-20% but when I look at CFM difference, it is like 50%)

Thanks for all help have great day

Edit: My case sits on my table like this for more clean air and less dust (so its not on the floor)

Update: I just bought Aerocool FS12 PWM as far as I understand Arctic P12 is static presure fan and they good for radiators or cooling blocks thats why it has more CFM also.
Thanks everyone for help