oh well you tell me you use RAID; and RAID and TRIM don't go together at all.
3G SSD though are a waste, because SATA III has improved how devices and features live and operate and I do not buy OWC.
Intel has never supported TRIM on hardware RAID.
OWC PCIe also has had a history - like any SSD only more so - of corrupting and needing restore (because it does not use TRIM for one). DATA on their PCIe does fine, but not the system :-(
An SSD, the larger the capacity the more channels it has, so that a 240GB will have more channels and support higher IO and why 480GB even more so, and your smaller units less and don't do as well (and 80GB and smaller fare the worst).
The only way today you get 960GB in an SSD is by combining... that to me is totally unique and different and beyond the scope of the normal single SSD used for a system in the native SATA II drive bays in a Mac Pro, or on a PCIe card in non-array setups. It is particular to OWC and RAID for one thing.
Just trying to see if SSD or not is suitable to the OP before confused out of their wits that it is all too much!
960GB SSD $1000 and you are using NAND not "off the shelf commercial SSDs".