OCZ Releases 180GB and 360GB Models of Agility 3by Kristian Vättö on February 29, 2012 3:52 PM EST
Today OCZ added two more capacities to their Agility 3 lineup: 180GB and 360GB. Agility 3 isn't the first SSD series to feature such SSD capacities, but more often we see 120GB, 240GB, and 480GB SandForce based SSDs. However, making a 180GB or 360GB SSD isn't any more difficult. The SF-2281 controller supports up to eight channels but it can also run in 6-channel mode and that's how you make 180GB and 360GB drives.
Remember that SandForce drives use about 7% for over-provisioning by default plus possibly RAISE as well depending on the SSD. Hence these SSDs have 192GiB and 384GiB of actual NAND in them. 2.5" drives usually have 16 NAND packages but to run in 6-channel mode, you only use 12 packages (i.e. two NAND packages per channel). For the 180GB model, that means twelve 16GiB NAND packages with two 8GiB dies per package. 360GB simply doubles the dies per NAND package so you have twelve 32GiB packages with four dies each.
|Specifications of New Agility 3 SSDs|
|Raw NAND Capacity||192GiB||384GiB|
|NAND Type||Asynchronous 25nm MLC|
|4KB Random Read||35K IOPS||35K IOPS|
|4KB Random Write||50K IOPS||25K IOPS|
|Price||19,000 Yen ($237)||36,000 Yen ($448)|
Even though only six channels are used, there is no performance loss according to the specs. Read speed is the same for all Agility 3 drives but write speed is dependent on the capacity: low and high capacity drives have worse write performance than the medium capacities. This is why the 180GB model is faster in writes than the 360GB model.
The new capacities have already been listed by some retailers and the 180GB seems to go for around $225 while the 360GB is listed at $425. The price per GB is about the same as what other Agility 3 drives offer, so these are viable options if you're looking for something in between 120GB and 240GB or 240GB and 480GB models.