Model, MX6B EZ. CPU: Slot 1. Support Intel Slot 1 Pentium II/III/Celeron FSB MHz. Chipset: Intel ZX Intel PIIX4. Main Memory: PC SDRAM. Find great deals for Working - AOPEN Mx6b EZ Slot 1 Motherboard ATX SDRAM ISA PCI AGP - UK SELLER. Shop with confidence on eBay! To determine part numbers for the AOpen MX6B EZ motherboard we used best guess approach based on CPU model, frequency and features.