Stefan Mileschin

Intel today finally announced its SSD 910 "Ramsdale" PCI-Express SSD family. This is Intel's first SSD in the PCI-Express add-on card form-factor. Like its 2.5" SSD 710 series, the SSD 910 utilizes HET-MLC NAND flash chips, arranged in four SSD subuits. SSD 910 design consists of three stacked PCBs, the one with the PCI-Express 2.0 x8 bus interface holds a PCI-Express to SAS bridge (essentially a RAID controller), and four SAS/NAND ASICs (SSD controllers). Each controller is wired out to its NAND flash memory chips, which are arranged in the other PCBs.

The PCIe-SAS bridge is made by LSI. The SSD 910 series comes in two variants based on capacity: 400 GB and 800 GB. The 400 GB variant has just two SSD subunits, and hence provides transfer rates (according to an older article) of 1 GB/s reads and 750 MB/s writes, with 90,000 IOPS reads, with 38,000 IOPS writes; while the 800 GB variant, with its four subunits, provides 2 GB/s reads with 1 GB/s writes, and 180,000 IOPS reads, with 75,000 IOPS writes. The launch price of the SSD 910 400 GB variant is US $1,929; while the 800 GB variant is priced at US $3859, at launch.

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