Lion overwrote old driver ....which driver?

Processor 2 x 3 GHz Dual-Core Intel Xeon (2007 ?)
Memory 18 GB 667 MHz DDR2 FB-DIMM
Graphics ATI Radeon X1900 XT 512 MB
pci1095,3124:

Type: RAID Controller
Driver Installed: No
MSI: No
Bus: PCI
Slot: Slot-2@15,0,0
Vendor ID: 0x1095
Device ID: 0x3124
Subsystem Vendor ID: 0x1095
Subsystem ID: 0x7124
Revision ID: 0x0002

Not sure which card this is or what driver to download.