Big cases?

[TVwazhere]

18 hours ago, Bombastinator said:

So negative pressure can be better than positive pressure but only if you can’t use any filters in which case it is less bad.  Negative pressure might be needed over neutral pressure for temps but would be worse for dust.

As an example the NZXT H500 by default uses negative pressure for pretty good GPU cooling, but mediocre CPU cooling. 

https://www.gamersnexus.net/hwreviews/3309-nzxt-h500-case-review-thermals-noise-vs-s340

Quote

Average GPU temperature in the torture test was 52.4 degrees Celsius with the stock fan configuration, and 53C with the top filter removed, a minor change within margin of error. Interestingly, temperature went up quite a bit with the 140mm intake fan added, up to 59.3C and 58.9C with the 120mm fans moved to front intake. This is where the the stock fan configuration starts to make sense. NZXT chose negative pressure because this allows the GPU to draw air in through empty expansion slots, rather than relying on intake from the mostly-sealed front of the case. When front intake fans are added, even ones pointing towards the GPU, this airflow pattern is disrupted and the GPU can no longer pull cool air in from behind the case.

 

[Bombastinator]

2 minutes ago, TVwazhere said:

As an example the NZXT H500 by default uses negative pressure for pretty good GPU cooling, but mediocre CPU cooling. 

https://www.gamersnexus.net/hwreviews/3309-nzxt-h500-case-review-thermals-noise-vs-s340

 

So achingly low temps all round.

[TVwazhere]

3 minutes ago, Bombastinator said:

So achingly low temps all round.

Keep in mind those are delta's, not actual. (so add about 18-22ºC depending on how cool or warm you have your thermostat set to, usually 20ºC)