The main difference is in the type of memory used. The enterprise-grade Vertex 3 EX uses single-level cell NAND flash memory chips and tops 80,000 IOPS for random 4K writes, while the consumer-focused Vertex 3 Pro packs multi-level cell NAND and manages 75,000 IOPS. The drives being shown today are using 32nm Toshiba toggle-mode NAND, but OCZ says it will go to market with 25nm Intel NAND when the drive is ready. There’s not set date for a launch but the new Vertex line apparently won’t see the light of day until sometime in Q2 with capacities ranging from 50GB to 400GB.

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