HPT370 UDMA/ATA100 RAID Controller supports up to 4 Ultra DMA/ATA 100 disk devices with a burst transfer rate of up to 100MB/Sec. The HPT370 is fully backward-compatible with all hard devices – including Ultra DMA/ATA 66, 33 and EIDE Fast ATA-2. HPT 370 co-exists with motherboard IDE ports, adding two additional IDE ports to PCI 2.0 or higher systems.