Good result. I think the third card isn't performing as the first two because of the RAM. If lolminer is using the RAM to compensate the vRAM missing, maybe at least 16gb RAM are needed, possibly 3200mhz so they are fast.
Thanks, but this is not the memory, somthing else, here is the specs of the MoBo
Expansion Slots:
2 x PCIe 3.0/2.0 x16 (Single at x16, dual at x8/x8, )
1 x PCIe 3.0/2.0 x16 (max at x4 mode, ) - i think that is the reason why the third works on smaller hashpower
3 x PCIe 3.0/2.0 x1
OK, now we know everything we need to know. In order to perform almost like 8gb card we need x8 lines for each 4gb card.
I do have ASRock H110 Pro BTC+ only, with only one PCI-e x16 slot. I placed a 4gb card in that socket without risers and it is giving me 28.5 mhs. All the other cards are on risers, the 8gb cards are running full speed for obvious reasons and for the remaining cards I am mining another coin...