Samsung intros faster SSD, sheds light on future technologies

Samsung's new and faster 840 EVO SSDs



At its event in Korea, Samsung just introduced the new 840 EVO series of SSDs. It's set to replace existing 840 SSDs, will have capacities of up to 1 TB and will be capable of much higher write speeds.  

The Samsung 840 EVO SSDs contain what Samsung calls '10nm class' ToggleNAND TLC-flash memory (likely 19nm) with 128 gigabit per die. The 840 EVO comes in five versions:120 GB, 250 GB, 500 GB, 750 GB and 1 TB. A technology called TurboWrite increases the write speed. 250 GB and larger models have a maximum write speed of 520 MB/s, which is more than twice as fast as the Samsung 840 250 GB. The 120 GB model has a maximum write speed of 410 MB/s, more than three times faster than the Samsung 840 SSD 120 GB.

The EVO drives comes with new software as well. Samsung has developed a tool that can use unused RAM as cache for the SSD. The Korean company also improved its data-migration software. The latest version allows you to skip certain files or folders when you migrate, which makes it easier to copy a larger hard disk to a smaller SSD.  

Samsung has yet to release exact prices for the new SSDs, but they indicated they will be on the same level as the current 840 series.

Samsung 840 EVO120 GB250 GB500 GB750 GB1 TB
Controller Samsung MEX Samsung MEX Samsung MEX Samsung MEX Samsung MEX
DRAM cache (DDR2) 256 MB 512 MB 512 MB 1 GB 1 GB
Read speed 540 MB/s 540 MB/s 540 MB/s 540 MB/s 540 MB/s
Write speed 410 MB/s 520 MB/s 520 MB/s 520 MB/s 520 MB/s
4k Read IOPS (QD1) 10000 10000 10000 10000 10000
4k Write IOPS (QD1) 33000 33000 33000 33000 33000
4k Read IOPS (QD32) 94000 97000 98000 98000 98000
4k Write IOPS (QD32) 35000 66000 90000 90000 90000

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