Rear-exhaust (blower) graphics card air flow rate

[Bouowmx]

Sites do not test the title, and I do not own a a comparable product to figure out, but what is the air flow rate of the exhaust of a blower graphics card at full fan speed, particularly those with unobstructed exhaust like AMD Radeon Vega Frontier Edition and NVIDIA GeForce GTX 1080 Ti Founders Edition, as compared to well-known case fans?

 

[Elixer]

I am sure each blower/fan is rated a certain CFM...
The point of blower style is to exhaust the heat from the vid card outside the case.

 

[Bouowmx]

Searching disassembles for mentions of fan model name..

Yes, I understand the specialty of rear-exhaust graphics card.

Hoping that a forum member can chime in, even with subjective comparisons.

 

[nathanddrews]

Quality 120mm case fans will easily do 80-120 CFM each while being quiet. GPU blowers are more like 10-30 CFM while being louder. It's really no contest. It wouldn't surprise me if people with multiple 120-140mm exhaust fans end up sucking air IN through the GPU blower assembly.

Never hurts to do a smoke test (easy if you enjoy cigars) or just hold up a sheet of toilet paper or a tissue to make sure the air is going the correct way...

 

[HutchinsonJC]

It wouldn't surprise me if people with multiple 120-140mm fans end up sucking air IN through the GPU blower assembly.

It'd be fair to say "multiple exhaust" fans in what you're saying no? Such that even though the GPU blower is attempting to exhaust air itself, it potentially turns into an avenue for reverse air flow because of other exhaust fans?

I never followed much on push/pull... positive/negative pressure bits.

 

[nathanddrews]

exhaust

Fixed.

Most cases have enough holes and vents that you're not really going to have the type of sealed enclosure necessary to get that kind of pressure buildup, but you can easily get cavitation which will disrupt air cooling efficiency.