I have some. Let me check.

I have 1 new in box Gigabyte B250m-gaming 3
https://www.newegg.com/Product/Product.aspx?Item=N82E16813145007

I have a used gigabyte ga-z270-hd3
https://www.newegg.com/Product/Product.aspx?Item=N82E16813128974

I have a used gigabyte aorus ga-z270x-gaming k5
https://www.newegg.com/Product/Product.aspx?Item=N82E16813128966

I have a used gigabyte ga-b250-hd3
https://www.newegg.com/Product/Product.aspx?Item=N82E16813128988

I have a used biostar racing z170gt7
https://www.newegg.com/Product/Product.aspx?Item=9SIA85V62U4795

all of the above should work.  although the new one is just that new never tested.

  the other 4 all worked right before they came off line.


3 suspect boards



I have a used biostar racing z170gt7
https://www.newegg.com/Product/Product.aspx?Item=9SIA85V62U4795

I pulled one filled sized pcie off the board  never bothered with it after that I suspect it could be repaired.

an asrock h81 pro btc  always had trouble getting this to work perfectly gave up trying but it would do 3 and 4 cards okay fail on 5 and 6

https://www.newegg.com/Product/Product.aspx?Item=9SIA85V6WD4039


an older board a msi z77a-gd65

2 sticks of ram and a cpu  come with it

https://ark.intel.com/products/71073
https://www.newegg.com/Product/Product.aspx?Item=9SIA6393S49288
https://www.newegg.com/Product/Product.aspx?Item=N82E16820231428
https://www.ebay.com/itm/MSI-Z77A-GD65-LGA-1155-Intel-Motherboard-Clean-and-Works-Great/282862348922?