Will AOC-USAS-L4I support Server 2008 R2 64-bit? If yes, which firmware and driver? If not, which card could be a replacement?
Yes, please see driver at https://www.supermicro.com/wdl/driver/SAS/LSI/1064_1068/IR/Driver/Windows/1.26.05/
For firmware, please see https://www.supermicro.com/wdl/driver/SAS/LSI/1064_1068/IR/Firmware/B3/L4i/