Does anyone know what the difference in pressure is (inches or mm h20) across the Antminer S9 when running at full rpm?
I found the specs of the fans (QFR1212GHE-SP01) and the CFM vs deltaP and am trying to calculate the actual CFM through the miner when running at full RPM.
THX
I found the specs of the fans (QFR1212GHE-SP01) and the CFM vs deltaP and am trying to calculate the actual CFM through the miner when running at full RPM.
THX
Why? the firmware will insist you run a fan at 4000 or 4500 rpm if it is auto tune. So it will stay noisy on auto tune or just shut off.
I'm sizing some exhaust fans and was thinking to size them such that they can handle the maximum expected CFM of my farm. For example, if I have 40 x S9's and the max CFM per S9 is 180 CFM (for example), then I would want to ensure my exhaust fans can handle 40x180 = 7200 CFM. I figure this is a simpler way to size the fans rather than try to calculate via heat load and ambient temperature info, which may have a degree of error. Does this make sense or maybe you know of a better way?
