Systems And Methods For Accessing Memory Devices Using Virtual Memory Ranks

A memory system includes a first set of memory devices, a second set of memory devices, and a memory controller circuit system. The memory controller circuit system groups a first one of the memory devices in each of the first and the second sets into a first virtual memory rank based on eye margins of first data signals sampled by the first virtual memory rank. The memory controller circuit system groups a second one of the memory devices in each of the first and the second sets into a second virtual memory rank based on eye margins of second data signals sampled by the second virtual memory rank. The memory controller circuit system accesses the memory devices in the first virtual memory rank separately from the memory devices in the second virtual memory rank during data access operations.