Areca 1212, 4 x SATA/SAS hardware RAID, 256MB cache, PCI-E

Areca ARC-1213-4i, 4 x SATA/SAS II hardware RAID, 512MB cache, PCI-E

Broadcom MegaRAID 9341-4i bulk, 4 x SATA/SAS 12Gbs internal entry level hardware RAID, no cache/BBU possible, PCI-e

LSI MegaRAID 9240-4i bulk, 4 x SATA/SAS II internal entry level basic hardware RAID, no cache, no BBU possible, ideal for low end VMware vSphere, MS Hyper-V and Citrix XenServer, PCI-E

LSI MegaRAID 9266-4i bulk, 4 x SATA III/SAS II internal hardware RAID, 1024MB cache, up to 128 hard drives via expander backplane, support for SSD CacheCade 2.0 write and read caching, CacheVault support (advised), ideal for high end VMware vSphere, MS Hy

LSI MegaRAID 9361-4i 1GB cache, 4 x SATA/SAS 12Gbs internal hardware RAID, max. 240 hdd using expander backplanes