hi guys,

I just built a new rig, Fatal1ty H270 Performance with 4GB ram, I3 cpu and 6 x asus radeon rx 570 expedition oc

When I installed 2 cards first on their own in PCIe slots, then windows 10 etc , blockchain drivers plsu patchers I would get solid 27MH/s (BIOS moded on all cards).

then, I moved the mobo to open case and plugged all six GPUs in using PCIe risers, installed drivers etc, then used the patcher, I can see in GPUz all cards have correct drivers etc.

I run Claymore , it detects 6 cards, stars mining and all I get is 21mh/s

any idea what am I doing wrong please?