The ACARD has a similar streaming speed to the i-RAM PER SATA PORT. The bigger model has two SATA ports which you can access separately, each offering half the installed RAM as a disk device. So two ports in RAID0 is roughly equivalent (a little faster) to two i-RAMs in RAID0. If the single-port option is used, then you will get a disk the full size of the RAM, so bigger but not much faster than an i-RAM.
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