I will leave it here and let experts to discuss results 🙂

-- Single memory channel with two Intel SSD 760p SSD


-- Dual memory channel with two Intel SSD 760p SSD


-- Dual memory channel with three SSD (2 Intel 760p + 1 Samsung PM981) >> Samsung is slower. (image shows 476Gb there is unallocated space)


-- Single memory channel with three SSD (2 Intel 760p + 1 samsung PM981)


-- Dual memory channel with three SSD (2 Intel 760p + 1 samsung PM981) split in two partitions 01 >> Looks like this partition holds Samsung SSD


-- Dual memory channel with three SSD (2 intel 760p + 1 samsung PM981) split in two partitions 02