Does 5086B-TRF (X8OBN) support Intel 7500 series CPU? Besides, can I use two CPU for processor board #1 and other model for processor board#2 ?
Yes. 5086B-TRF (X8OBN) does support 7500 series CPU. It limits at X7560, X7550, E7540, L7555, L7545, X7542 only. For mixing CPU model in different processor boards, it does not support this configuration.