|OCZ Vertex 4 Solild State Drive|
|Reviews - Featured Reviews: Storage|
|Written by Olin Coles|
|Tuesday, 12 June 2012|
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OCZ Vertex 4 Solid State Drive Review
Manufacturer: OCZ Technology Group, Inc.
Full Disclosure: The product sample used in this article has been provided by OCZ.
Based on the Everest 2 platform and featuring Ndurance 2.0 technology, the OCZ Vertex 4 solid state drive arrives one year after they acquired the well-known flash controller manufacturer Indilinx. Boasting the industry's best SATA-based I/O performance, the Vertex 4 series (VTX4-25SAT3) is designed to deliver optimized performance for enthusiasts wanting to capitalize on near-instant response times. OCZ Vertex 4 SSDs are available in up to 512GB capacities, and deliver up to 550MB/s read speeds with up to 95,000 Random Read IOPS. In this article Benchmark Reviews tests these specifications, and compares the OCZ Vertex 4 solid state drive to the leading competition.
For those keeping up with the Indilinx Everest SSD controller, OCZ's announcement back in July (2011) listed a 275 MHz dual-core CPU with 128KB on-chip SRAM for programs and another 64KB for data. Soon after the first product to utilize their new Everest platform was the OCZ Octane SSD, which debuted early in 2012 with a 512MB DRAM cache buffer operating at 400 MHz. Now mature and into it's second generation, Everest 2 features a dual-ARM controller architecture based on Marvell controllers that optimize reduced write amplifications without data compression to yield better I/O and help extend the product warranty for Vertex 4 to an industry leading five years.
Solid State vs Hard Disk
Despite decades of design improvements, the hard disk drive (HDD) is still the slowest component of any personal computer system. Consider that modern desktop processors have a 1 ns response time (nanosecond = one billionth of one second), while system memory responds between 30-90 ns. Traditional hard drive technology utilizes magnetic spinning media, and even the fastest spinning mechanical storage products still exhibit a 9,000,000 ns / 9 ms initial response time (millisecond = one thousandth of one second). In more relevant terms, the processor receives the command and must then wait for system memory to fetch related data from the storage drive. This is why any computer system is only as fast as the slowest component in the data chain; usually the hard drive.
In a perfect world all of the components operate at the same speed. Until that day comes, the real-world goal for achieving optimal performance is for system memory to operate as quickly as the central processor and then for the storage drive to operate as fast as memory. With present-day technology this is an impossible task, so enthusiasts try to close the speed gaps between components as much as possible. Although system memory is up to 90x (9000%) slower than most processors, consider then that the hard drive is an added 1000x (100,000%) slower than that same memory. Essentially, these three components are as different in speed as walking is to driving and flying.
Solid State Drive technology bridges the largest gap in these response times. The difference a SSD makes to operational response times and program speeds is dramatic, and takes the storage drive from a slow 'walking' speed to a much faster 'driving' speed. Solid State Drive technology improves initial response times by more than 450x (45,000%) for applications and Operating System software, when compared to their mechanical HDD counterparts. The biggest mistake PC hardware enthusiasts make with regard to SSD technology is grading them based on bandwidth speed. File transfer speeds are important, but only so long as the operational IOPS performance can sustain that bandwidth under load.
Bandwidth Speed vs Operational Performance
As we've explained in our SSD Benchmark Tests: SATA IDE vs AHCI Mode guide, Solid State Drive performance revolves around two dynamics: bandwidth speed (MB/s) and operational performance (IOPS). These two metrics work together, but one is more important than the other. Consider this analogy: bandwidth determines how much cargo a ship can transport in one voyage, and operational IOPS performance is how fast the ship moves. By understanding this and applying it to SSD storage, there is a clear importance set on each variable depending on the task at hand.
For casual users, especially those with laptop or desktop computers that have been upgraded to use an SSD, the naturally quick response time is enough to automatically improve the user experience. Bandwidth speed is important, but only to the extent that operational performance meets the minimum needs of the system. If an SSD has a very high bandwidth speed but a low operational performance, it will take longer to load applications and boot the computer into Windows than if the SSD offered a higher IOPS performance.