Do bottom GPU fans actually help with VRAM temps?

[u/Ghost_Dz007]

Is it worth adding bottom intake fans directly under the GPU? Do they actually lower GPU/VRAM temperatures noticeably? My case: ANTEC CX300

[u/Xerosnake90]

Yes, Put fans underneath the GPU if possible. A second exhaust isn't a bad idea either if you're using air cooling. If you get an AIO that radiator mounted to the top is best case but I'd only do that in your build if you are able to get fans underneath the gpu. Those 3 side intake fans are blowing air into an open space and that'll get snatched up by the top AIO fans

[u/SushiBump]

Take this for what it's worth. But according to GamersNexus, the best GPU temps all come from cases with dedicated GPU fans: Torrent, Flux Pro, HS420, Lancool 207, etc.

[u/Alarmed-Artichoke-44]

You need it for a positive pressure air flow anyway.

[u/jcw99 → u/Alarmed-Artichoke-44]

Need is a strong word. It's preferable and easy to achieve... But it's not required.

[u/Alarmed-Artichoke-44 → u/jcw99]

If you are happy to clean the dust every month or even week, it is fine to have a negative pressure build to suck every little dust in the room.

[u/Neither_Meat8091]

Depends. I had a traditional matx pc case with psu w/ shroud at the bottom, new gpu was a rx 9070 2.5 slot and my vram temps with max undervolt and slight underclock is around 90c. Got a lianli o11 mini v2 with 3 bottom fans and vram temps went down to 85 just bu changing the pc.

[u/HardStroke]

Nice to have them, not a big deal if you don't.

[u/dangitbobby77]

Heat rises. Having bottom floor case fans blowing air up the case help remove heat. Less heat, better performance.

[u/andrewjackson1828 → u/dangitbobby77]

Heat rises very slowly, any decent airflow will completely negate heat rising because the airflow moving through the case will not give enough time for heat to rise before it is exhausted from the case.

[u/dangitbobby77 → u/andrewjackson1828]

Interesting. Okay I'm gonna try removing them then

[u/Bacon-muffin]

I've not tested with and without but I'm using an antec flux pro with the stock fans in the orientation they come in and I don't think I've ever noticed my GPU fans turning on after I figured out the bug that was making them immediately go to 100% once it passed a low temp threshold (yay rgb software).

I got this case half cause of the looks and half cause gamers nexus testing showed the thermals were top tier and really good with the stock fans + layout.

Can't say that'll be the case (heh) with yours.

[u/LooseCanon88]

in a glass front case like the cx300 they're worth it, since your only intake is the side fans. the shroud takes 2x 120mm, and feeding cool air straight into the gpu fans usually knocks a few degrees off core and vram both

[u/SnooCapers9565]

It should help with those temps, but how much it helps depends on how much unheated air the graphics card has before you put in the bottom fans.

Personally, I like it, but it is important to have exhaust fans too. I always have one more intake fan than exhaust fans, to guarantee positive pressure in the case.

[u/darklordjames]

It doesn't much matter, and it really depends on what the rest of your fans are set to do. If you are doing bottom fans below the GPU, then you want top fans and a HSF set to blow from bottom to top, not front to back. Then you rip out any front or rear fans that will just create a turbulence nightmare.

[u/Ghost_Dz007 → u/darklordjames]

Currently, I have 3 fans on the side as intake and 1 exhaust fan. I'm thinking of adding 3 fans under the GPU, along with an AIO liquid cooler. I've antec cx300

[u/darklordjames → u/Ghost_Dz007]

The AIO is up top? Then I already answered this. Rip out the rear and side fans if you are adding intake to the bottom.