Asrock X58 Extreme3. Internal memory: 24576 MB, Supported memory types: DDR3, Maximum internal memory: 24 GB. Processor family: Intel, Processor socket: Socket B(1366). Certification: FCC, CE, WHQL ErP/EuP. BIOS memory size: 8 MB, ACPI version: 1.1. Compatible operating systems: Microsoft Windows 7 / 7 64-bit / Vista / Vista 64-bit / XP / XP 64-bit