SanDisk’s Extreme II SSD Uses “Two Tier Caching” to Improve Performance

Maximum PC: SanDisk today unveiled its Extreme II SSD series, a follow-up to the original Extreme SSD that we reviewed last year (we evaluated the 240GB model). The Extreme II SSD line is supposedly faster than the original in most instances, part of which is due to the use of a select amount of single-level cell (SLC) NAND flash memory for what SanDisk describes as a "two tier caching" setup.