Most variants include at least one PCI Express x16 slot for dedicated graphics and multiple SATA ports (SATA II or SATA III).
Because this code appears on various boards from different eras, the "Intel Desktop Board 21 B6 E1 E2" specification can vary widely. Below is a breakdown of the most common hardware configurations associated with this marking. intel desktop board 21 b6 e1 e2 specification exclusive
Often features the LGA 1155 (for 2nd/3rd Gen CPUs like the i5-2300) or LGA 1150 (for 4th Gen CPUs like the i3-4330). Most variants include at least one PCI Express
Typically supports DDR3 SDRAM across 2 to 4 DIMM slots, often with a maximum capacity of 16GB or 32GB depending on the specific model. Often features the LGA 1155 (for 2nd/3rd Gen
While the code itself doesn't define the board, it is most frequently seen on legacy boards from the and Haswell (4th Gen) eras.