OCZ Agility 4 – 256GB SSD review

It has become clear that simply conducting endless benchmarks on SSD drives is pointless. Real users may run a few benchmarks when they first fit their SSD drive, but most users just want a drive that performs well in the real world. They want their drive to work "out of the box" and work fast and smoothly.

Most of the latest SSD drives can deliver very fast sustained reading and writing speeds, but these alone tell you very little about how the drive will perform in the real world.

If you intend to use your SSD as your primary system drive, with an operating system and applications installed and running from the drive, real world performance becomes much more important than just fast sequential read and write speeds.

Real world copy tests

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I will now conduct a few real world copy tests. These tests simulate what real people do with their drives. I will be conducting writing tests, using a large single file and a multiple file copy of various file sizes. Then I will round off the tests by copying a folder of MP3 audio files, and also a folder of JPG pictures.

I should point out that this is not a scientific way of measuring performance. These timings were taken with a stop watch; I have however ensured that the reading drive is well able to supply a data stream to our writing drive, which is high enough not to be slowing down the performance of the writing drive.

I will once again be comparing the obtained results with our comparison drives, and will present the results in the form of graphs.

Multiple file copy writing test

For this test I copied the Nero Burning Rom install folder from our review PC to the OCZ RevoDrive X2 240GB SSD, and then copied the contents from the RevoDrive X2 to the OCZ Agility 4 SSD and our other comparison drives.

Our test copy contained 1,772 files of various sizes with a combined capacity of 307MB.

The OCZ Agility 4 is showing very good performance, and is in second place in this test.

Single large file writing test (7.95GB)

For this test I used a single DVD9 ISO file which had been copied to the OCZ RevoDrive X2 240GB SSD. The file was then copied to the OCZ Agility 4 SSD and our comparison drives.

The large ISO file contains quite a lot of incompressible data which is quite a handicap to the SF-2281 based SSDs. Incompressible data is a strong point of the Indilinx Everest 2 platform, and the Agility 4 is showing excellent performance.

Write a folder of JPG picture files.

For this test I copied a folder of JPG picture files from our OCZ Vertex 3 SSD to the OCZ Agility 4 SSD, and our other comparison drives. The folder contained 3,714 JPG pictures, with a total capacity of 5.16GB.

Once again, the OCZ Agility 4 is showing excellent performance, and finishes in second place in this test.

Write a folder of MP3 audio files.

For this test I copied a folder of MP3 audio files from our OCZ Vertex 3 SSD to the OCZ Agility 4 SSD and our other comparison drives. The folder contained 851 MP3 audio files, with a total capacity of 3.85GB.

Once again, the OCZ Agility 4 finds itself in second place.

Summary

We already know the OCZ Agility 4 has excellent writing performance, and basically these tests are based on writing performance. What these tests do show is that even in the real world the Agility 4 maintains this excellent writing performance.

Single drive copy tests

These tests are to simulate a single drive in a PC or laptop. In other words, I will copy a series of files from one folder on the tested drive to another folder on the same drive. This means the drive is simultaneously reading and writing during the tests. I also want to make this a realistic test, so I have used a folder of MP3 music files, and then repeated the test with a folder of JPG picture files.

Single drive copy tests – 851 MP3 song files (3.85GB total)

With the SSD having to read and write in this test, I was a little surprised to see the Agility 4 doing so well. Nonetheless, it finishes in second place in this test.

Single drive copy tests – 3,714 JPEG picture files (5.16GB total)

With more data to read in this test, the Agility drops a place, and finishes third.

Windows start-up and closedown

For these tests, I simply used a stop watch and tested the amount of time taken for a full installation of Windows 7 to boot to the desktop, and then timed how long it took for Windows 7 to close down by the normal start menu method.

The timing was started once the BIOS had initialised and reached the “loading OS message”.

Windows 7 boot time

Windows 7 closedown

There is very little difference in the time taken to boot Windows 7 between the modern SATA 6Gbps SSDs, and the same applies to the time taken to shut the PC down.

Installing applications

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Installing applications is possibly something you don’t do that often. But should you replace your system disk, then you will most likely have to re-install your applications. Most of the SSD drives I have tested up until now are quite slow at installing applications, most likely because their I/O performance was quite limited.

For these tests, we picked some popular applications and copied the entire contents of the CD or DVD media to an OCZ Vertex 3 240GB SSD. We did this to make sure that the reading speed of our CD/DVD reader would not hamper the performance of the target drive.

We then installed these applications onto our comparison HDD drives, which were all running mirror image installations of our Windows 7 Home Premium 64-bit installation, and timed the amount of time taken to install the application with a stopwatch on each of the drives.

MS Office 2007 Professional (full install)

MS Office is one of those applications that make you cringe at the thought of re-installing it.

Let’s find out how our drives coped with the MS Office 2007 full install.

The OCZ Agility 4 showed an excellent turn of speed when installing this large office suite.

Adobe Fireworks CS3

Adobe Fireworks CS3 is another popular package. Let’s find out how our drives coped with installing this application.

There isn’t a huge margin in the amount of time taken to install this application with our modern SSDs. However, the OCZ Agility 4 finishes in second place in this test.

Summary

Our real world tests, though not scientific in nature, I feel are more realistic than simply running benchmarks. What is clear from these tests is that the OCZ Agility 4 256GB SSD has very good performance in the real world.

Let’s check out application and game loading performance on the next page of this article…..

• Anvil's Storage Utilities
• Application and game loading performance