product description asrock m266a p4m266a 533/400mhz support ht base on via p4m266a chipset and intel� pentium 4 processors, m266a is a upgrade version of m266 which can support 533mhz fsb and hyper threading technology. packed with the features such as onboard video, agp 4x, 3 pci 2.2 slots,1 amr slot, ata133, usb 2.0, 2 channels audio, 10/100mbs ethernet lan, microatx form factor and cpu overheating protection mechanism.