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OCZ Vertex 4 256GB (VTX4-25SAT3-256G)

OCZ ditched the SandForce controller in their Vertex 4, instead opting for their own Indilinx Everest 2 controller. How does the new controller perform compared to others? Can it carry the Vertex brand to the next level? 


The SSD landscape is changing rapidly. Two years ago, Intel was using their own controller while OCZ was using third-party controllers like SandForce and Indilinx in their drives. Since then, OCZ has acquired Indilinx, and uses their controllers. Intel uses SandForce controllers in their SSD’s.

Although SSD technology has matured  over the last few years, it is still relatively new and no single manufacturer has yet emerged as the clear winner dominating the market. A few years ago, Intel was projected to take that role, but since then, SandForce, Marvell, and Samsung have emerged as the top three performance/enthusiast controller. Interestingly, it was Indilinx’s Barefoot controller  that came out of nowhere in 2008 to challenge Intel for the crown. However, Indilinx has been relatively quiet since it burst into the scene, finally being acquired by OCZ. 

It makes perfect sense for OCZ to acquire its own SSD controller. The more aspects of product design a company has control over, the fewer issues crop up, and better compatibility is ensured. SSD performance is dictated by the controller, the NAND devices, and the firmware. Controlling all three would mean the ability to maximize performance by tightly integrating the hardware and the software. That is why OCZ acquired Indilinx. OCZ is able to use the in-house controller paired with their own firmware. While OCZ still relies on a third party for their NAND chips, having their own controller means they don’t have to rely on another company to deliver performance. It also lets OCZ stand out among the different SSD makers as one of the few companies that own and design their own controllers. Furthermore, since OCZ now has the control over both the controller and the firmware, they should be able to provide much quicker fixes to any bugs and also able to further fine-tune their drives at both levels to maximize performance. 

OCZ’s partnership with SandForce controller has helped the company to firmly place its name in the enthusiasts SSD market with the drives like the Vertex 2 and Vertex 3. The Vertex 4 ditches the SandForce controller and uses OCZ’s own Indilinx Everest 2 controller. While no one doubts OCZ will put a greater emphasis on the Indilinx controller from now on, it is quite surprising to see OCZ adopted it so quickly and used it in one of their best-selling products. The Vertex series drives have been regarded as the best performing SSD on the market and it is unlikely that OCZ wants to damage their own reputation and brand. This is highly indicative of OCZ’s confidence with its latest controller. 

Vertex 4 with Indilinx Everest 2

Source: Indilinx

The Vertex 4 is not the first SSD with Indilinx Everest controller after OCZ’s acquisition. In fact, OCZ had launched the Octane drive a few months ago using the first generation Everest controller. The Vertex 4 uses the second generation Indilinx Everest controller that has been fine-tuned for higher performance up to 120,000 random IOPS and features improved NAND flash management, called Ndurance 2.0, for extending the NAND flash life and SSD reliability. The Everest 2 controller can achieve sequential bandwidth of up to 535 MB/s, 4K random read up to 95K IOPS and random write up to 85K IOPS.  

The Everest 2 controller is powered by a 400MHz dual-core CPU with 8 NAND channels and up to 1GB of 800 MHz DDR2/DDR3 DRAM for caching.The controller supports SATA 6 Gbps interface, NCQ, background garbage collection, TRIM, 256-AES encryption, ECC correct up to 128 random bits/1KB, and Ndurance 2.0. Ndurance 2.0 is the latest technology from Indilinx that features reduced write amplification without compression, advanced Multi-level ECC, and Adaptive NAND Flash management. 

Available in storage capacities from 64GB to 512GB, the drive uses  2xmm Synchronous MLC. Our 256GB drive has a rated sequential read of 550MB/s, sequential writes of 465 MB/s, random 4K read of 90K IOPS, and random 4K write of 85K IOPS. It appears as though OCZ is able to squeeze a little bit of performance through its firmware optimization, and is able to achieve 555 MB/s sequential write even though the Everest 2 controller is officially rated with 535 MB/s.

The Vertex 4 is packaged in the same packaging as previous drive. If it weren’t for the logo and the Indilinx mark on the corner, it would be hard to tell it apart from Vertex 3. Opening up the box we see that OCZ has included a 3.5” adapter, a bag of screws, a sticker and an Installation Guide and Warranty Info sheet.  

Inside the Vertex 4 we can see the Indilinx Everest 2 controller is being surrounded by eight dual-die packaged Intel 25nm MLC 16GB synchronous NAND devices  (29F16B08CCME3). Eight more devices are underneath the PCB for our 256GB drive. The Everest 2 controller supports ONFI 2.3 and  Toggle Mode NAND 1.0. It is possible that in the future, we may see drives that uses Toggle NAND but for now the drive will only be using ONFI NAND.

Looking at the image above, you will see there are actually a gold contact points on the edge of the PCB that look like mSATA or mini PCI-E connectors. We are not sure what they are for but it is possible that OCZ is working on a version of the drive that will support either interface that will come to the market int he near future.

The drive is equipped with two 256MB DDR3-1333 (2GD22 D9LGQ) for a total of 512MB cache onboard. It appears that OCZ has not fixed the amount of DDR3 on the Vertex 4 drive as we have seen reviews online that some drives will come with 1GB of memory while others may have 512MB. Also, the speed on the memory varies as well; there are some drives with memory speed at 800MHz, 1066MHz or 1333MHz. Since the Everest 2 controller supports DDR2/DDR3 800MHz, the faster speed DRAM will not gets you extra performance. OCZ simply uses whatever is available at the time or whatever makes most cost-efficient when building the drive.  

 The idle power consumption of the Vertex 4 is rated at 1.3W and the active power is 2.5W. This is one area where OCZ definitely has some work to do. SSDs sit in idle for the most of the time since they are so fast, and typical SSD idle power consumption is around 0.5W. The idle power consumption of 1.3W is very high and is even higher than many 2.5” hard drives. While this is not going to be much of an issue for desktops, it means shorter battery life for mobile systems. The active power consumption, however, is comparable to other drives. 

  Vertex 4 Intel SSD 520 Vertex 3 240 GB Vertex 3 MAX IOPS 240GB
Controller Indilinx Everest 2 SandForce SF2281 SandForceSF2281 SandForceSF2281
Sustained Sequential Read (MB/s) 560 550 550 550
Sustained Sequential Write (MB/s) 510 520 520 500
NAND Lithograph 2x nm Sync 25nm Sync 25nm Sync 34nm Toggle
MTBF (hours)   4,000,000 2,000,000 2,000,000
4K Random Read (IOPS) 90,000 50,000 40,000 (155 MB/s) 55,000 (215 (MB/s)
4K Random Write (IOPS) 85,000 60,000 60,000 (235 MB/s) 65,000 (250 MB/s)
Max 4K Random Write (IOPS) 120,000 80,000 85,000 (330 MB/s) 85,000 (330 MB/s)
Warranty 5 year 5 year 3 year 3 year
Price (for 240GB) $349(Retail) $509 (MSRP) $374.99 (Retail) $479.99 (Retail)

Looking at the specs sheet, the Vertex 4 certainly delivers very competitive numbers compared to the SandForce SF2281 drives. We shall see if it is able to keep its promise.

The drive comes with 5 year warranty, up from 3 years that is found on the Vertex 3. Three years seemed to be the industry standard but lately we have seen a few manufacturers are providing drives with 5 year warranty such as the Intel SSD 520. It is good to see a longer warranty period since it indicates the manufacturers’ confidence in their products. This is specially bodes well for OCZ’s confidence with the Vertex 4 and its new Indilinx controller. While warranty does not guarantee a product’s reliability, it is nonetheless good to see longer period.


To test the OCZ Vertex 4 we cloned our test rig drive to the SSD. It is the same test drive we’ve been using on all of our drive testing and is nothing more than a clean Windows load with all the drive testing software installed, as well as all the current drivers and patches for the OS. It’s the equivalent of doing a fresh load of Vista from the disc but takes a lot less time and ensures that every drive tested uses exactly the same OS load and drivers. Nothing that may effect the outcome of the testing procedure can creep in. We ran all of the tests a total of 3 times and averaged those results. The Average of the three results are presented here. In the case of a pictorial benchmark we ran the bench 3 times and picked the median result. As with most SSD testing differences from run to run are minimal and the median result is a good indication of what you can expect from the drive.

We ran our usual battery of tests on the drive, and used it as the primary boot drive during testing. All of the drives tested were used as the primary boot drive during testing. That’s a more realistic test than strapping the drive in and testing it with a bare format or as a non-boot drive and it represents real life transfer rates, much like you can expect when you install and operate the drive in your own system. Each test was performed 3 times and the average of the 3 test run is reported here.

Test Setup

Test Setup
Case Type None
CPU Intel Core i5 2500K
Motherboard Asus P8Z68-V Pro
Ram Kingston HyperX 1600
CPU Cooler Prolimatech Megahalem
Storage Drives

OCZ Vertex 4

OCZ Vertex 3

OCZ Vertex 3 Max IOPS

Crucial RealSSD C400

Intel SSD 520

Seagate Momentus XT 750GB

Optical None
GPU Gigabyte GTX 260 OC
Case Fans 120mm Fan cooling the mosfet CPU area
Docking Stations None
Testing PSU Cooler Master UCP 900W
Legacy None
Mouse Microsoft Intellimouse
Keyboard Logitech Keyboard
Gaming Ear Buds None
Speakers None


Random Read and Write


We start off by looking at the Vertex 4’s random read and write performance. Off the bat, the Vertex 4 shows a very good start. Its random read at low queue depth is just as fast as the Vertex 3 at queue depth of 1 and is 5% faster than the Intel SSD 520 at queue depth of 3. 

The Vertex 4 dominates the random write where it delivers 236 MB/s at queue depth of 1, which is more than double what the SandForce SF-2281 controller can deliver. At a queue depth of 3, the drive’s 308 MB/s is still 25% faster than the SandForce drives. 

Sequential Read and Write


While most desktop workloads do not use more than a few queue depth, we always include the higher queue depth to show the drive’s potential. Here we can see the Vertex 4 is able to achieve 346 MB/s random read and 312 MB/s random write. The random read trails behind the Crucial C400 drive but is 20% faster than the SandForce drives. Even at this high queue depth, the Vertex 4 still dominates the random writes by 25%. 

Unfortunately, the sequential read performance for the Vertex 4 is slower than the Vertex 3. At a queue depth of 1, we see the Vertex 3 is 80% faster and at queue depth of 3, it is 35% faster. The sequential write is also a tad slower, about 10-15%, compare to the Vertex 3. 


Random Read and Write 


We use AS SSD benchmark to test a drive’s performance at handling highly compressed and incompressible data. The random read and write for the Vertex 4’s performance here mimics what we have seen with the Iometer. So, the drive is very good at handling both compressible and incompressible data when comes to random read and write.

At higher queue depth, the Vertex 4 once again shines where it is 30% faster both read and write than the fastest SandForce drives.

Sequential Read and Write

Just like the Iometer result, the Vertex 4’s sequential read of incompressible data is still lagging behind the SandForce (but not by that much). However, the sequential write result is a completely different story than what we have seen with the Iometer. Here the Vertex 4 is more than 50% faster than the SandForce drives. Recall, that in the Iometer, the SandForce drives dominate the sequential write by 10-15% thanks to the SandForce’s DuraWrite technology that compress the data written to the NANDs. Taking the compression algorithm out of the equation, the Vertex 4 is clearly the faster drive. 

Crystal DiskMark

The results from the Crystal DiskMark pretty much mimic what we have already seen with Iometer and the AS SSD. 

PCMark 07


As always, we include the PCMark 07’s storage benchmark as a way to gauge how a drive performs in typical workloads. Here, the Vertex 4 scored 5194 points, just a few points below the Crucial C400 drive. The SandForce drives takes the top spots in this benchmark mostly likely due to the faster sequential read and the compressible data used in the benchmark.

For the most part, the Vertex 4 performs about the same as the SandForce drives. The drive falls slightly behind in the Video Editing, Windows Defender, and Gaming, but excels in the Importing Picture to the Photo Gallery test. The differences are fairly small which may not going to be something that would be easily detected. The Application Loading test, however, clearly favors the SandForce drives. Application loading is primarily a read intensive task that focuses on random read but it is tests small amount of sequential read so the Everest 2’s weaker sequential read has a small impact on the performance. 


The latest Indilinx Everest 2 controller delivers some exceptional performance. It offered the same random read as SandForce SF-2000 controller and much faster random write. The sequential write is also comparable to the SandForce based drives when dealing with compressible data but it is significantly faster at dealing with incompressible data. The Everest 2 would have earned the title of the best controller if it were not for its weak sequential read speed, especially at low queue depths. As we see with the Application Loading test, the drive suffered a little bit because of its sequential read performance.

All things considered, the latest Indilinx Everest 2 controller and Vertex 4 is competitive enough against other enthusiast drives. However, there is still work to be done. Besides the sequential read, the Vertex 4 really needs to improve upon its idle power consumption. As a desktop drive, the idle power consumption of the Vertex 4 is not going to pose much of an issue but for mobile systems, it would mean that your battery life will suffer. Hopefully, OCZ is able to further tune its firmware to improve upon these two areas in the near future.

What OCZ is able to achieve in such a short period of time since its acquisition is rather impressive. With the Vertex 4, the company essentially gives us a drive that is fast writing any type of data and delivers a competent read performance. The real strength with the Vertex 4 is in the high queue depth and incompressible workload, making it a great drive for the enterprise market. 

A quick search on shows that the Vertex 4 is currently selling for $239.99, which is cheaper than the Vertex 3’s $299.99. Considering the pricing, performance, and the 5-year warranty, the Vertex 4 is certainly a great buy. With OCZ now having control over both the controller and the firmware, we have high hopes that the company will be able to deliver a competitive SSD with better reliability in the future and also be able to deliver much quicker bug-fixes. 

OUR VERDICT:  OCZ Vertex 4 256GB
Performance 8.5
Value 9
Quality 9
Features 9
Innovation 9
We are using a new addition to our scoring system to provide additional feedback beyond a flat score. Please note that the final score isn’t an aggregate average of the new rating system.
Total 9
Pros Cons

Excellent IOPS in Iometer

Good random read

Excellent random and sequential write

Excellent performance under high queue depth

Great write performance regardless of file type

Competitive price

5 year warranty

Sequential read is slower especially at low queue depth

High idle power consumption


Summary: The OCZ Vertex 4 with Indilinx Everest 2 controller delivers good random read, random write, and sequential write performance. Considering the pricing, performance, and the 5-year warranty, the Vertex 4 is certainly a great buy, and it earns the Bjorn3D Golden Bear Award.


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  1. Vertex 4 uses Marvell controller, not Indilinx.

    • thank you for the feedback. You are correct that the controller is indeed manufactured by Marvell though OCZ markets it as Indilinx Everest 2. It uses OCZ’S own firmware. OCZ did not disclose as to exactly which Marvell controller is used.

    • Sorry but you are wrong, Vertex 4 uses the Indilinx controller.

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