Allytech TM GP1251 IDE ATA133 PCI Expansion Card 2 Ports Upgrade For PC Supports Bus Master DMA at 133 MB/sec PCI burst rate. Supports maximum IDE/ATA data transfer rate of 66MB/sec(100MB/sec). 3.3v operating Voltage with 5v tolerant I/O. Via VT6410 chipset. Supports Windows XP, Vista & Win 7.