The new SanDisk Extreme II features an in-house developed firmware which helps to set it apart from other SSDs using the same controller. Also of note, the second generation Extreme series has dumped the SandForce controller in favor of the new Marvell 88SS9187, the same controller used by the Crucial M500.
SanDisk is pricing the 240GB Extreme II competitively fetching around $230, right on target with the Vertex 450 and also in the neighborhood of the Samsung 840 Pro, which will remain a secondary focus throughout this review.
The SanDisk Extreme II SSD features 550/510 MB/s in sequential read/write speed, and 95,000/78,000 random read/write IOPS. The Extreme II is manufacturer with NAND foundry capabilities and offers the SanDisk ReadyCache caching solution. It comes in 120GB, 240GB and 480GB versions.
The Samsung 840 Pro SSD has been fitted with Samsung's latest MDX controller, a triple-core ARM-based chip that supports SATA 6Gb/s and can be paired with the latest 20nm NAND flash memory. Samsung claims a MTBF of 1.5 million hours and a 1500G shock resistance and the 840 Pro is backed by a limited five-year warranty.
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