i'm using gigabyte am2+ and am3 old motherboard just about 25-30usd(not new) in here
it have 5 pcie and i'm using 1 to 3 multiplier so all is 7 gpu
and it's all work fine
,all x4 procesor.
i have asrock btc it just can boot with 7 gpu too,cannot boot if i add 8 gpu,no mather what procesor i put on it.
i have asus rampage black edition too(expensive one),it just support i7 procesor,it has 6 pcie,using 1 to 3 multiplier it can boot 8gpu.
biostar 990fxa am3 it have 4 pcie..i can add 2x 1 to 3..but it just can boot 7 too,cannot boot if i add 8.
the most i can add gpu is in z170 asus(expensive too),if i'm using celeron it just can boot 7 gpu,if i'm using i7..i can add 2 of 1to3 multiplier and it's working all.
so until now if i build new rig,i just using the gigabyte old one,it's very cheap hahaha
it have 5 pcie and i'm using 1 to 3 multiplier so all is 7 gpu
and it's all work fine
,all x4 procesor.i have asrock btc it just can boot with 7 gpu too,cannot boot if i add 8 gpu,no mather what procesor i put on it.
i have asus rampage black edition too(expensive one),it just support i7 procesor,it has 6 pcie,using 1 to 3 multiplier it can boot 8gpu.
biostar 990fxa am3 it have 4 pcie..i can add 2x 1 to 3
..but it just can boot 7 too,cannot boot if i add 8.the most i can add gpu is in z170 asus(expensive too),if i'm using celeron it just can boot 7 gpu,if i'm using i7..i can add 2 of 1to3 multiplier and it's working all.
so until now if i build new rig,i just using the gigabyte old one,it's very cheap hahaha
This is brilliant news man. Thank you for testing it with all your motherboards. I would request everyone here to do the same, for the benefit of the community.
Can you get 8 cards to work on the Asus Rampage? Are 8 cards mining using Claymores with that combination?
For now, I can get 7 cards to work on Asrock H81 Pro BTC V2, and the Biostar TB85, but 8 GPU's do not work on either of these boards under windows.
Will be testing them on linux with 8 GPU. Then will also test it on the MSI Gaming 5/7 for 8 cards, and the several Am2+ and Am3 boards I have and report back here.
My F5 button is almost dead. Big investors are waiting here 
