PCIe x16 for dedicated graphics or high-speed RAID controllers.
1 x PCI Express 2.0 x16 slot (plus peripheral PCIe x1 slots) SATA II (3.0 Gb/s) and/or SATA III (6.0 Gb/s) native ports Rear I/O Connectivity intel desktop board 21 b6 e1 e2 specification exclusive
If you look directly at an Intel desktop board, you'll see various text printed on the PCB. Most of these are regulatory numbers that are common across many models. "21 B6 E1 E2" is precisely one of these markings. It's crucial to understand that because it is not a unique product identifier. Mistaking it for the model number is the most common source of confusion for PC users. PCIe x16 for dedicated graphics or high-speed RAID
