Support for 2nd Generation Intel Core i3, i5 (e.g., i5-2300), and i7 processors. Memory: Typically DDR3 SDRAM with 2 DIMM slots. Expansion: Often includes 1 x PCI Express 2.0 x16 slot.

Often features PCI Express 2.0 x16 slots for dedicated graphics cards. How to Find Your Exact Specification Link

Based on historical data for boards with these markings, yours is likely one of the following:

The Intel Desktop Board 21 B6 E1 E2 is a reliable and feature-rich motherboard, offering a range of specifications and features that cater to various computing needs. Its support for Intel processors, expandable memory, flexible storage options, and integrated graphics make it a suitable option for desktop computing, business computing, and entry-level gaming applications. By understanding the motherboard's specifications and features, users, system builders, and IT professionals can make informed decisions about its use in their computing systems.

For Windows 7 and legacy 32-bit/64-bit systems, drivers are usually available through the Intel Download Center .

Intel Desktop Board 21 B6 E1 E2 with i3-4330 3.5GHZ 8GB DDR3 ATX LGA 1155/Socket H2 | DDR3 SDRAM

Here is the official specification link from Intel: