Rear fan as Intake

[brightgamer]

So let's be clear I fully understand the "proper" setup for air flow would be intake front, bottom & side fans with exhaust fans as back and top. But I was curious about possibly switching my back fan to intake to blow fresh air over my RTX 3090 VRAM to maybe help with temps. The back of my PC sit close to a window and with it being winter I get some cold air coming in , sometime I'll crack my window to help but not often though. My CPU is water-cooled and do not have a heatsink with fan on it as I figured that would be the main problem with having your rear fan as intake it would cause conflict with it. Just want to get yall thoughts, comments.

 

Cool

[Skiiwee29]

Should be fine honestly and won't hurt at all if you have top exhaust as the pressure from that should pull the air upwards. The best way to help with VRAM thermals of the 3090s is to change the thermal pads if your VRAM is hitting 100c or higher under load. 

[Dedayog]

10 minutes ago, brightgamer said:

So let's be clear I fully understand the "proper" setup for air flow would be intake front, bottom & side fans with exhaust fans as back and top. But I was curious about possibly switching my back fan to intake to blow fresh air over my RTX 3090 VRAM to maybe help with temps. The back of my PC sit close to a window and with it being winter I get some cold air coming in , sometime I'll crack my window to help but not often though. My CPU is water-cooled and do not have a heatsink with fan on it as I figured that would be the main problem with having your rear fan as intake it would cause conflict with it. Just want to get yall thoughts, comments.

 

Cool

Test it and see.  I mean we can speculate that it'll be fine, but doesn't hurt anything to try it and see, to get real numbers.

 

let us know, I am curious to see how it compares to standard airflow.

[Helpful Tech Witch]

Could you take a pic of the case?
If i had to guess front intake fans would blow more air on the 3090 vram than a back intake.

 

[brightgamer]

39 minutes ago, HelpfulTechWizard said:

Could you take a pic of the case?
If i had to guess front intake fans would blow more air on the 3090 vram than a back intake.

 

My case is the Thermaltake View 71 TG. The last picture is closer to what it looks like now. Haven't taken any recent pictures:

https://pcpartpicker.com/b/DmpG3C

[thrasher_565]

1 hour ago, brightgamer said:

My case is the Thermaltake View 71 TG. The last picture is closer to what it looks like now. Haven't taken any recent pictures:

https://pcpartpicker.com/b/DmpG3C

thats going to be a hot case so...you need the back fan for exhaust for the gpu heat. posably removing the pci slot covers might help a bit.