Quote from: Iomgui on November 17, 2018, 11:20:20 PM

Hi,

Has anyone had both Z9 mini and innoslicon A9 exploited in same conditions (especially temperature) ? Which one is the quieter, is it by far or small difference ? Could you compare the noise of A9 to a Z9 mini set to 50% fan ?

(i ask because my noise limit in my environnement is close to Z9 mini at 50% fan).

Many thanks in advance

Hi there. Yep I have both running side by side. i can't tell you at 50% fan speed - well because I don't see the need. I leave them at auto. But for reference, at 100% during startup the A9 is louder than 2x Z9 mini's side by side.
In normal operation (right now):

A9: 15% fan speed 66/69/66 C 53KSol/s
Z9 Mini: 3,600 rpm 47/47/48 14.7KSol/s
It's about 24C ambient here. The A9 is slightly louder than the mini.

To be honest, I think they are both pretty quiet in the world of ASIC's but the Mini is quieter (one fan only). Note that the standard Innosilicon PSU is much noisier than the ASIC (I swapped to a HP PSU instead and its much better).
To answer your question without testing your 50% noise limit - I would estimate that the A9 would be a little bit noisier. This will depend on your fan speed though since the A9's auto seems to run a lot hotter.

Hope that helps.