AIDA64 Random Access Time
Version and / or Patch Used: 1.60
Developer Homepage: http://www.aida64.com
Product Homepage: http://www.aida64.com
AIDA64 offers several different benchmarks for testing and optimizing your system or network. The Random Access test is one of very few if not only that will measure hard drives random access times in hundredths of milliseconds as oppose to tens of milliseconds.
Drives with only one or two tests displayed in the write test mean that they have failed the test and their Maximum and possibly their Average Scores were very high after the cached fills. This usually happens only with controllers manufactured by JMicron and Toshiba.
SSDs are marketed as these really fast drives that can move large amounts of data quickly. A good example is the Corsair Force 3 that we are looking at today. The marketing guys say, "Hey look at this, 550MB/s". The truth is that you will really only see that 550MB/s a few times each day. What you will feel every time you sit down at your computer is the data access time. SSD access time is measured in microseconds. Traditional mechanical drives are measured in milliseconds and the difference in the way your system feels is amazing.
The Corsair Force 3 is able to access data at .22 of a millisecond. At the bottom of the chart we list one of the quickest spinners, the WD VelociRaptor. The VelociRaptor 600GB takes an average of 7.01 milliseconds to read the same small piece of data. When you launch a program you are asking the drive to play back several pieces of data and the latency adds up quickly. SSDs will deliver your data in most cases before your finger is lifted from your mouse button.
The same is true when it comes to writing data to the drive. Here we see the Corsair Force 3 writing data at an average rate of .23ms. When you write data you are usually reading it from a slower source, so in many cases the SSD is actually limited by the source. Because of this the write latency isn't as important for day to day activities, but it is nice to see the SandForce SF-2281 controller doing a really good job at this task without using a DRAM buffer.
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