Quote from: DR_BamBam on September 13, 2018, 03:59:31 PM

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almost every antminer (even older models) has one additional connection. I thought the same but no one did it before. I doubt that bitmain will send you a new board (solo) for 200 usd.

Im sure they will since another user on this forum got one sent to him after he burned out a board, my question is will it work ? Im hoping some one with 2 units can set one up and test it, if it works i will hit up bitmain and say i fried one of my boards due to overclocking and i can order a replacement just like the other user.

the post is some where in this thread
https://bitcointalk.org/index.php?topic=3509006.0

It will work but you need to adjust firmware so it initiates the 4th board or the 4th chane (for z9 mini). But what I've done is simply loaded firm from big z9 onto mini with 4 boards - z9 big one has 2 chains per board so it will load what you need - works like a charm at 681 I get stable 24K. I will be immersing them in a little bit

one thing though it shows stupid temps like 1C or 7c but as long as you keep fan at 75% or above or in my case immerse them you should be ok