What is a double-sided DIMMs that provide more than one bank?

Double-sided DIMMs (Dual In-line Memory Modules) refer to memory modules that have memory chips on both sides, effectively doubling the available memory capacity compared to single-sided DIMMs. When a DIMM provides more than one bank, it means that it is divided into multiple sections or "banks" of memory, allowing for more efficient data access and improved performance. This design enables the memory controller to access different banks independently, facilitating better multitasking and overall system performance.