If you are familiar with the downsides - as it seems you are - then go for it.
I have some mining since 2014 or so and still going strong.
They are beasts as you say, but noisy and hot!

https://bitcointalk.org/index.php?topic=2932282.0

Is this Bitmain testing early the new F3?

It is not a BIOS restriction. Jeez, even gamers run 2 cards......

I think it is more likely a BIOS setting issue, Biostar for instance require you set a "mining mode" switch in the BIOS.

With no experience on (although have a 50% complete build on the Asrock H110) specific boards it is hard to say, but don't be too deterred, I am 99.9% sure its not the cards that are the issue.

Are you using 390.65? The install on multiple cards can take a while, when you add a 2nd does it show as "Basic Display" or "VGA controller?" or not at all?

Hi I am trying to get 12x 1070 running on Win10/Biostar BTC-250PRO
ATM getting WHEA uncorrectable BSOD, putting it down to driver or installation issue but now worried I cannot find any confirmed details of Win10 systems over 8 NVidia GPUs.

@roptix did you have any joy?

I am using Biostar BTC250-Pro, no problems. 8 GPU per board at the moment.