Side Fans push/pull air?

[davidst99]

Hi, I have a Corsair Vengeance case. I have two 120mm fans toward the bottom in front pushing in air. The 120mm at the upper back fan is blowing air out. I also have two 140mm fans on top of the cases blowing air out. I have a question about the two 140mm side fans. They align up to my 2x GTX 980s in SLI. Should I have them blowing air towards the GPUs or pulling air out? Most of the fans are Noctua. I have a 1250W Seasonic PSU at the bottom that brings up and out the back so it shouldn't affect the temperature in the case (I think ).

Thank you.

David



Here's a link to my case:

http://www.corsair.com/en-us/vengeance-c70-mid-tower-gaming-case-gunmetal-black

 

[BonzaiDuck]

Hi, I have a Corsair Vengeance case. I have two 120mm fans toward the bottom in front pushing in air. The 120mm at the upper back fan is blowing air out. I also have two 140mm fans on top of the cases blowing air out. I have a question about the two 140mm side fans. They align up to my 2x GTX 980s in SLI. Should I have them blowing air towards the GPUs or pulling air out? Most of the fans are Noctua. I have a 1250W Seasonic PSU at the bottom that brings up and out the back so it shouldn't affect the temperature in the case (I think ).

Thank you.

David



Here's a link to my case:

http://www.corsair.com/en-us/vengeance-c70-mid-tower-gaming-case-gunmetal-black

What cooling method and strategy do you use for your CPU and GPUs? Specifically, what cooler or coolers?

 

[davidst99]

What cooling method and strategy do you use for your CPU and GPUs? Specifically, what cooler or coolers?

Thanks for the response. I my GPUs are EVGA Gefore GTX 980 Super Overlocked ACX 2.0 versions. They each have two fans on them. I didn't add after market coolers but I did buy the EVGA OEM metal back plates that lowers the temperature a bit.

I have a I7-4790K with the Kraken X60 All In One Cooler. It's kind of an overkill since I can't really overclock my CPU. I think just got a bad batch.

Thanks,

David

 

[BonzaiDuck]

Thanks for the response. I my GPUs are EVGA Gefore GTX 980 Super Overlocked ACX 2.0 versions. They each have two fans on them. I didn't add after market coolers but I did buy the EVGA OEM metal back plates that lowers the temperature a bit.

I have a I7-4790K with the Kraken X60 All In One Cooler. It's kind of an overkill since I can't really overclock my CPU. I think just got a bad batch.

Thanks,

David

Where did you place the Kraken? At an exhaust vent, or an intake vent? That is -- are the radiator fans exhausting from the case, or drawing air into the case?

As to the overclocking -- once you get this cooling situation sorted out -- you should at least be able to make the minor tweaks to the system BIOS so that the processor can "turbo" to 4.4 Ghz for "all cores." That's the default turbo speed for that processor, but I don't think the default is "for all cores."

Are you new to this? If so, I wouldn't give up on that particular processor just yet . . .

Ideally you'd want to install the Kraken cooler at intake. If you choose instead to install it in the top of the C70 case as exhaust, then you'd want all the other fans in the case deployed to intake air, but that leaves the traditional rear exhaust fan -- to decide whether it should be intake or exhaust. If you install the Kraken at intake, the other fans could also be intake, but the rear fan would definitely be deployed as exhaust.

I have better and more reliable opinions about using a heatpipe-tower for air-cooling, so someone else might offer more and better ideas.

You also might want to look at this thread:

http://forums.anandtech.com/showthread.php?t=2408847&highlight=c70

 

[davidst99]

Where did you place the Kraken? At an exhaust vent, or an intake vent? That is -- are the radiator fans exhausting from the case, or drawing air into the case?

As to the overclocking -- once you get this cooling situation sorted out -- you should at least be able to make the minor tweaks to the system BIOS so that the processor can "turbo" to 4.4 Ghz for "all cores." That's the default turbo speed for that processor, but I don't think the default is "for all cores."

Are you new to this? If so, I wouldn't give up on that particular processor just yet . . .

Ideally you'd want to install the Kraken cooler at intake. If you choose instead to install it in the top of the C70 case as exhaust, then you'd want all the other fans in the case deployed to intake air, but that leaves the traditional rear exhaust fan -- to decide whether it should be intake or exhaust. If you install the Kraken at intake, the other fans could also be intake, but the rear fan would definitely be deployed as exhaust.

I have better and more reliable opinions about using a heatpipe-tower for air-cooling, so someone else might offer more and better ideas.

You also might want to look at this thread:

http://forums.anandtech.com/showthread.php?t=2408847&highlight=c70

Hi, I'm not new to overclocking. I'm just not good at it I was able to bump it up to 4.6 Ghz without playing with the playing with the voltage. How how do you think this CPU can go? If it's only an extra GHz or so I'm happy at 4.6 Ghz. I really can't tell the difference between 4.4 and 4.6.

Also, my DDR3 ram is only 1866. Could that be limiting my overclocking?

I have Kraken set up as an exhaust. I was thinking if the radiator is hot it would just pull in that hot air into the case. I replaced the stock Kraken 140mm fans with two 140mm Noctua NF-A15 PWN fans because the stock fans were way too loud. The Kraken software recognized them and adjusts their speed as needed. Thanks. You are right, if I had to do it again I wouldn't get an all in one water cooler but a good quality heat-pipe tower.

David

 

[Deders]

If you can filter your intakes then having more air pushed in than out will mean much much less dust to worry about.

 

[davidst99]

If you can filter your intakes then having more air pushed in than out will mean much much less dust to worry about.

Thanks for the advice. I ordered filters for all my intake fans.

 

[BonzaiDuck]

Hi, I'm not new to overclocking. I'm just not good at it I was able to bump it up to 4.6 Ghz without playing with the playing with the voltage. How how do you think this CPU can go? If it's only an extra GHz or so I'm happy at 4.6 Ghz. I really can't tell the difference between 4.4 and 4.6.

Also, my DDR3 ram is only 1866. Could that be limiting my overclocking?

I have Kraken set up as an exhaust. I was thinking if the radiator is hot it would just pull in that hot air into the case. I replaced the stock Kraken 140mm fans with two 140mm Noctua NF-A15 PWN fans because the stock fans were way too loud. The Kraken software recognized them and adjusts their speed as needed. Thanks. You are right, if I had to do it again I wouldn't get an all in one water cooler but a good quality heat-pipe tower.

David

there have been recent threads -- or more of a history over the past year -- with a debate or discussion between me and XavierMace (forum member).

In principle, I concede to XavierMace that a radiator at an intake port (fans configured to push air into the case) is optimal. But there are other factors, including the size of the case. The more intake air coming in and going out of the case, the less any difference in cooling temperatures of an exhaust radiator versus intake.

On the potential for the i7-4790K, I've seen some folks boast of 4.8, and an outfit that delids your processor for you after picking among the better performers also boasts 4.8 (ostensibly because of the additional ~10C more or less reduction in temperatures from the delid and TIM replacement with CLU.)

WGusler, who authored that thread about his H80 + C70 rig for the 4790K, was able to get to 4.6, IIRC. Maybe it was 4.7. But I think his stress-test temperatures were in the low 70's. I'd have to go back to that thread and see exactly what he reported.

He offered the observation that the difference between 4.4 and 4.6/4.7 wasn't noticeable, and I think he meant that per benchmark scores.

Also, there is another possible factor which often gets missed in discussion. If Hyper-threading is enabled in BIOS, it may limit clockspeeds attainable as opposed to a disabled configuration. You could test clockspeeds, temperatures, stability and performance both ways.

Just a thought about the fans. Those are good Noctua fans, but the airflow is too limp for my taste. And that's OK, too. I noticed the other day that there is a 140mm Noctua iPPC fan:

http://www.newegg.com/Product/Produ...8047&cm_re=noctua_ippc-_-35-608-047-_-Product

It offers considerably more airflow with only an 800 RPM increase over the NF-A15's speed. The trick would be thermally controlling the fans and minimizing any noise, but that's all "do-able." If you can increase airflow without appreciably adding to noise, you might find the full cooling capability of the AiO's radiator. Not a point I wanted to argue, but just a thought and opinion.

 

[Aikouka]

You'll want them positioned as intake fans as they should provide better airflow to the GPUs. It'll also give your case positive pressure (more intake than exhaust), which means that your case will push air out vents to reach equilibrium with the air outside. Since you have 3 exhaust and 2 intake, you most likely causing negative pressure, which causes air to come in through the vents to reach equilibrium. This is usually avoided, because that air tends to contain dust particles, which means your case ends up dustier on the inside.

 

[Essence_of_War]

You'll want them positioned as intake fans as they should provide better airflow to the GPUs. It'll also give your case positive pressure (more intake than exhaust), which means that your case will push air out vents to reach equilibrium with the air outside. Since you have 3 exhaust and 2 intake, you most likely causing negative pressure, which causes air to come in through the vents to reach equilibrium. This is usually avoided, because that air tends to contain dust particles, which means your case ends up dustier on the inside.

I firmly agree with this. Side fans should be intakes to the GPUs.

 

[john3850]

When I first set up HAF 932 with a push pull 360 rad on top I set the side fan a 230mm to out for better dust control from cats.
I learned that setting the side fan a 230mm to blow in and by putting filters on only the front intake area reduced the dust by over 50%.