Where can I find the list of the fans you're selling?

can give model number?

got models with 80mm and 92mm? Prefer lower power and not loud one.

Those RPMs (added 2 noisy delta fans!)

Especially GPU 1 / 3

Using 2 fans at present on 1, seems  sufficient.

But weather is cold today ... so that helps also. Normally all fans are at close to 2000 or more.

Latest rig mod - Extended the frame to add 4 x 190cfm delta focus flow fans (provided by Allngap).

Before & After pics:



Before this I was using a normal 16" home table fan as the main blower on the rigs. Eventually
I switched to a monster 28" industrial stand fan @ 9000cfm , BUT surprisingly the results
were exactly the same as using the table fan.

Switching to the new delta fans setup, there was an immediate improvement on performance.
Temps dropped by ~10C and gpu rpms are slower as well when hashing Scrypt and Scrypt-N.

Conclusion is that their tighter airflow and higher pressure from the deltas are able to push
through the nooks and crannies, whereas the air big fans just slams and goes around the rig
structure as a whole and fails to flow tightly in between the parts.

One thing to note however is that the high pressure from the deltas would physically force the
nearest gpu fan to spin slower. Sometimes it would be so strong that Sgminer would go haywire
and refuse to start the gpu as the rpm and / or temp sensor goes nuts. To fix it, I partially taped
off the openings at the front of the gpu so LESS air enters the gpu shroud. Something to be
aware of should you intend to use this kind of setup.

All 280x.

Suspect the gpu fan was overstressed spinning against the delta's airflow, monitoring it on my own rigs as well.

But then again I guess the deltas alone are also strong enough to cool the gpus, just rip off the shroud and stock fans