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Old 10-07-2012, 05:13 AM   #1
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[Anandtech.com] Corsair Releases Force Series GS SSDs


Corsair has released a new member of its Force series SSDs called the Force GS. The Force GS is based on SandForce's SF-2200 series controller (most likely SF-2281) and uses Toggle-Mode MLC NAND (24nm Toshiba Toggle-Mode 2.0 NAND is the likely candidate). As expected, the Force GS uses a 6Gb/s SATA interface and comes in a 2.5" form factor. Corsair is providing three years of warranty, which is pretty common for consumer SSDs (some OEMs such as Intel, Plextor and OCZ have started offering 5-year warranties as a standard, though). Below is a specification table of the Force GS:

Corsair Force Series GS Specifications User Capacity 180GB 240GB 360GB 480GB Raw NAND Capacity 192GiB 256GiB 384GiB 512GiB Number of NAND Packages 12 16 12 16 Number of Die per Package 2 2 4 4 Sequential Read 555MB/s 555MB/s 555MB/s 555MB/s Sequential Write 525MB/s 525MB/s 530MB/s 455MB/s Max 4K Random Write 90K IOPS 90K IOPS 50K IOPS 50K IOPS Street Price $175 $220 $320 $450 Due to the use of Toggle-Mode NAND, there is a slight increase in write speeds (around 10MB/s in sequential and 5K IOPS in random speeds) compared to SF-2281 SSDs with ONFi 2.x NAND.

The biggest ddifference between the GS and most SF-2281 SSDs is the inclusion of 180GB and 360GB models. There are actually a few other 180GB SandForce SSDs including Intel's 330 and 520, OCZ's Agility 3 and Mushkin's Chronos; but 360GB is a much more uncommon capacity. The only other 360GB 2.5" SSD available at NewEgg is OCZ's Agility 3, although it's out of stock at the moment. Building 180GB and 360GB drives isn't rocket science thanks tk the flexibility afforded by SandForce. SF-2200 controllers have a total of eight channels but they can also run in 6-channel mode. To achieve capacities of 180GB and 360GB, you simply run the controller in 6-channel mode and equip the PCB with twelve NAND packages. With twelve dual-die (16GB) NAND packages, the raw NAND capacity is 192GiB. Subtract the space taken by RAISE and over-provisioning and you're left with a usable capacity of 180GB. The 360GB model simply has twice as many NAND die per NAND package, hence doubling the capacity.

Corsair's Force GS is available immediately and at least NewEgg is already listing the drives on their site (check the street price links above). Pricing is quite fair as we are looking at less than $1 per GB at all capacities.





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