Yeah it's a Corsair 4000D air flow case. I have perhaps two of the hottest components in it as well the 3800 MSI Suprim X and a 5800x
I've undervolted the CPU and that took it down 10c, with no real performance loss. On Cinebench it goes to 83 max. On Cyberpunk at 4k max settings (97-99% gpu utilisation) it goes to about 83 max for both of these two stock fans.
On a side note I also discovered that who ever installed the Black Rock Pro 4 Fan installed it wrong (I think?) By installing the outer fan as a case fan. I only noticed it come on during intense games (not at all on cinebench). Plugged it into the "System pump" fan for now and will get them to send me the splitter it should have come with to connect to cpu fan port.
So with regards to air pressure there's no benefit of "pushing the air down" on the "?" Label. I thought it might of helped cool the gpu and "push" the air down and back, to the exhausts. I think I was overthinking it
It's six Noctua NF-P12 Redux-1700 PWM fans I've ordered.