Desktop Test System
Lenovo W530 - Mobile Workstation
We use two systems for SSD testing. The desktop runs a majority of the tests and the Lenovo W530 runs the notebook power tests as well as the real-world file transfer benchmark.
ATTO Baseline Performance
Version and / or Patch Used: 2.34
ATTO is used by many disk manufacturers to determine the read and write speeds that will be presented to customers.
Before we get deep into the performance let's point out again that the Samsung 840 is Samsung's budget offering. In our testing we achieved nearly 560MB/s read performance. The big 5 6 0 isn't normally associated with budget offerings since it's pretty much the peak of SATA III. Then we get to the write performance. The 4K write speed as measured in ATTO with a queue depth of 4 was 211MB/s, a solid offering.
The maximum write performance though was only 335MB/s. This is like getting SandForce incompressible performance without the compressible performance to go with it.
We rarely see such staggered performance in SSDs. The read speed is very high and the write speed is very low. Samsung's marketing is very clear, this drive is designed to take your old beaten down Cadillac and make it feel like a speedy Porsche GT. If you're someone buying your first SSD then most SSDs will do that especially coming from any mechanical drive ever made. Let's see if the 840 lives up to the hype.