The RAIDR Express comes in two versions, 120 GB and 240 GB. That translates to two RAID configurations of two 60 GB SSDs and two 120 GB SSDs. We tested the 240 GB model that will cost about € 440 according to ASUS. That's about twice the price per gigabyte compared to standard SSDS.
The SSD contains the Marvell 88SE9230 RAID controller and two LSI SandForce SF-2281 SSD controllers. They're both combined with 120 GB of state-of-the-art Toshiba 19nm MLC flashchips. The Toshiba chips employ 16 kB pages.
Communication with the PC occurs via PCI-Express 2.0 x2, so you have to put the card in a PCI-Express x4, x8 or x16 slot. PCI-Express 2.0 x2 offers a transfer rate of up to 1 GB/s.
ASUS claims the 240GB model of the RAIDR can achieve speeds of up to 830 MB/s for reading and 810 MB/s for writing, in addition to 100.000 4k read and write IOps.
The full TRIM-compatibility is important, because it's often not present on other RAID-based SSDs which means their performance can decrease the longer they're in use. The card uses about 7W when idle, and 16W when in use according to ASUS.