Intel Desktop Board 21 B6 E1 E2 Specification -

Most include a PCIe x16 slot for discrete graphics, though modern power-hungry cards (like the GTX 1050 Ti and newer) may sometimes face power delivery or BIOS compatibility issues on these older platforms.

While the marking doesn't define the model, boards featuring the code are typically from Intel’s legacy desktop lineup (roughly 2008–2013). They generally support older hardware standards: intel desktop board 21 b6 e1 e2 specification

Look for a small barcode label with a number starting with "AA" (e.g., AA G14064-204). You can use this on the Intel Support site to find the exact model. Most include a PCIe x16 slot for discrete