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OCZ Apex 120GB SSD OCZSSD2-1APX120G E-mail
Reviews - Featured Reviews: Storage
Written by Olin Coles   
Thursday, 29 January 2009
Table of Contents: Page Index
Features and Specifications
First Look: OCZ Apex SSD
Apex SSD Internal Components
SSD Testing Methodology
Random Access Time Benchmark
Basic IOPS Performance
Linear Bandwidth Speed
I/O Response Time
Buffered Transaction Speed
Windows XP Startup Times
The Truth Behind Heat Output
Solid State Drive Final Thoughts
OCZSSD2-1APX120G Conclusion

ATTO Disk Benchmark Results

EDITORS NOTE: ATTO Disk Benchmark is not designed to be used as bandwidth speed tool, as the final results are determined by user-set variables. Benchmark Reviews uses ATTO Disk Benchmark as a tool for illustrating basic IOPS load performance at various chunk load sizes. Please read the Solid State Drive Benchmark Performance Testing article to understand how the benchmarks used in this article should be interpreted.

The ATTO Disk Benchmark program is free, and offers a comprehensive set of test variables to work with. In terms of disk performance, it measures interface transfer rates at various intervals for a user-specified length and then reports read and write speeds for these spot-tests. There are some minor improvements made to the 2.34 version of the program, but the benchmark is still limited to non-linear samples up to 256MB. While the bandwidth results are no realistic for determining the maximum drive speeds, ATTO Disk Benchmark is still a good tool for illustrating the bandwidth at different file size chunks. Please consider the results displayed by this benchmark to be basic IOPS performance indicators.

Beginning with the integrated Intel ICH10R Southbridge chip connected to the OCZ Apex, the ATTO Disk Benchmark tools performs file transfers ranging from 0.5 KB to 8192 KB. The OCZSSD2-1APX120G shows a 246 MBps read plateau from 128-8192 KB file chunks, while the 174 MBps write performance plateaus from 64-8192 KB.


The Apex SSD has the distinct advantage of having two internal SSD controllers to handle the RAID-0 stipe load. OCZ uses ATTO to define maximum read and write bandwidth for the OCZSSD2-1APX120G, which is stated as 230 MBps read and 160 MBps write bandwidth. This seems in-line with the JMicron specification for this architecture, which place the target read speed at 233 MBps and write performance at 166 MBps.

The ATTO Disk Benchmark tool reported an impressive 246 MBps maximum read bandwidth in our tests, and 174 MBps maximum write, making it appear that OCZ was actually conservative in their product specifications. Because of the MLC construction, and low on-die cache buffer, the OCZ Apex is best suited for high-performance desktop/notebook platforms.

Drive Hardware


In our next section, we test linear read and write bandwidth performance on the OCZSSD2-1APX120G and compare speeds with several other top storage products. Benchmark Reviews feels that linear tests are the best method for testing SSD products, as detailed in our Solid State Drive Benchmark Performance Testing article.


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