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So I was trying to run 7 Zotac 1070 Minis with Asus Z270F using Z270A image, the most it could detect is 6 Zotacs. Someone here said that Z270F runs 7 GPUs out of the box, but not in my case. I need to try windows to verify that. Do you have Z270F and planning to post an image? Running 6 Zotacs with TB85 for now, but Minis are so tiny that 8 could fit in Rosewill easily.

Thanks.

I just got one of these mobos in yesterday. I can get 7x cards to be detected by the system, but there is a conflict with x and the driver. I can manually OC the first 6 cards, but the 7th has no response to OC commands.

There is also what appears to be a TPM / Secureboot problem preventing subsequent boots into the same install. Initially changing the bios setting for enabling above 4gb encoding is required to get 7 cards to work. There are also some TPM / Secureboot bios changes that are needed, but I still need to isolate which. I started with the MSI z270-A PRO image.

I will work on this more tonight.

First of all this is an awesome project. Thanks for doing this. I will mine to your wallets or something to give monetary thanks.

Did you ever get any further on this Z270F mobo. I can only see 6 cards. I would love to get 9 going.

cheers ever so much.

With v0015 you can use 7x GPUs with that mobo; 9x if you have 2x m2 adapters.

Edit: ensure that you make the bios changes listed for that mobo on the OP.

I followed those instructions and I am using v0015.

Obviously it works then but I must be missing something.

It might be a hardware problem: what kind of risers are you using, and how are they powered?

What GPUs, and PSU?

7 x https://www.amazon.com/gp/product/B01N3UVJHM/ref=oh_aui_detailpage_o04_s01?ie=UTF8&psc=1
7 x https://www.neweggbusiness.com/product/product.aspx?item=9b-14-487-261
2 x https://www.neweggbusiness.com/product/product.aspx?item=9b-17-438-092
1 x https://www.neweggbusiness.com/product/product.aspx?item=9b-19-117-745
1 x https://www.neweggbusiness.com/product/product.aspx?item=9b-20-156-103

I dont have the m2 adapters yet.

only 6 cards show up in the bios which supports a hardware issue. I have another mobo which i can test. I tried a different riser

I have 4GPUs on one PSU and 7 on the other plus Mobo

Sometimes the gpu that isn't working; isn't the one you expect it to be.

To ensure you know which one isn't working; mine for a little while, at least 10 mins.

Feel the heatsink of each GPU until you find the one that isn't hot.

Power down the rig, turn off the PSU.

Either remove that GPU and test it on another motherboard;

or remove all the other GPUs and try booting with just the problem GPU directly in the primary slot in the mobo.

This should tell you if that GPU is INOP or not.

Let me know what the result is.

Going to sleep now.

Ok some more information.

Def not an issue with GPU.

I have an m2 adapter now and I can get 7 cards going. (6 pci + 1 M2)

The issue is the pcie slots. If any 6 are occupied then 6 work. If i try a 7th in any spot it does not show up. The tool in the bios only shows 6 cards, even when 7 are active with the addition of the m.2. Maybe they never expected 9 cards so its just not showing up in the tool.

I have a second build up to test 8 x 1070 gpus and a couple of 1kw power supplies. I will see if I have a different experience and let you know.

I have had a lot of graphical issues with this build.

I have a previous build on the Prime z270A with 7 cards and it has no issues.

Thanks for all your help. How best to show appreciation?

Please spread Crypto

.

Will do, am doing.

Got 7 cards to recognize in windows, so all 7 slots are now working. Set all the pcie modes to gen 2 in th bios. Will try to boot a new flash of nvOC shortly. AndI can post the bios settings for DL if it all works.