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Our testing methods
If you're familiar with our testing methods and hardware, the rest of this page is filled with nerdy details you already know; feel free to skip ahead to the benchmark results. For the rest of you, we've summarized the essential characteristics of all the drives we've tested in the table below. Our collection of SSDs includes the most popular SSD configurations on the market.

Cache Flash controller NAND
Corsair Force Series 3 240GB NA SandForce SF-2281 25nm Micron async MLC
Corsair Force Series GT 240GB NA SandForce SF-2281 25nm Intel sync MLC
Corsair Neutron 240GB 256MB LAMD LM87800 25nm Micron sync MLC
Corsair Neutron GTX 240GB 256MB LAMD LM87800 26nm Toshiba Toggle MLC
Crucial m4 256GB 256MB Marvell 88SS9174 25nm Micron sync MLC
Crucial M500 240GB 256MB Marvell 88SS9187 20nm Micron sync MLC
Intel 335 Series 240GB NA SandForce SF-2281 20nm Intel sync MLC
Intel 520 Series 240GB NA SandForce SF-2281 25nm Intel sync MLC
OCZ Agility 4 256GB 512MB Indilinx Everest 2 25nm Micron async MLC
OCZ Vector 256GB 512MB Indilinx Barefoot 3 25nm Intel sync MLC
OCZ Vertex 4 256GB 512MB Indilinx Everest 2 25nm Micron sync MLC
OCZ Vertex 450 256GB 512MB Indilinx Barefoot 3 M10 20nm Intel sync MLC
SanDisk Extreme II 240GB 256MB Marvell 88SS9187 19nm SanDisk Toggle SLC/MLC
Samsung 830 Series 256GB 256MB Samsung MCX 27nm Samsung Toggle MLC
Samsung 840 Series 250GB 512MB Samsung MDX 21nm Samsung Toggle TLC
Samsung 840 Pro 256GB 512MB Samsung MDX 21nm Samsung Toggle MLC
Seagate 600 SSD 240GB 256MB LAMD LM87800 19nm Toshiba Toggle MLC
WD Caviar Black 1TB 64MB NA NA

To illustrate how this crop of SSDs stacks up against mechanical storage, we've thrown an older Western Digital Caviar Black 1TB into the mix. Don't expect this 7,200-RPM hard drive to keep up; it's included for reference only.

We used the following system configuration for testing:

Processor Intel Core i5-2500K 3.3GHz
CPU cooler Thermaltake Frio
Motherboard Asus P8P67 Deluxe
Bios revision 1850
Platform hub Intel P67 Express
Platform drivers INF update 9.2.0.1030
RST 10.6.0.1022
Memory size 8GB (2 DIMMs)
Memory type Corsair Vengeance DDR3 SDRAM at 1333MHz
Memory timings 9-9-9-24-1T
Audio Realtek ALC892 with 2.62 drivers
Graphics Asus EAH6670/DIS/1GD5 1GB with Catalyst 11.7 drivers
Hard drives Corsair Force 3 Series 240GB with 1.3.2 firmware
Corsair Force Series GT 240GB with 1.3.2 firmware
Crucial m4 256GB with 010G firmware
WD Caviar Black 1TB with 05.01D05 firmware
OCZ Agility 4 256GB with 1.5.2 firmware
Samsung 830 Series 256GB with CXM03B1Q firmware
Intel 520 Series 240GB with 400i firmware
OCZ Vertex 4 256GB with 1.5 firmware
Corsair Neutron 240GB with M206 firmware
Corsair Neutron GTX 240GB with M206 firmware
Intel 335 Series 240GB with 335s firmware
Samsung 840 Series 250GB with DXT07B0Q firmware
OCZ Vector 256GB with 10200000 firmware
Samsung 840 Pro Series 256GB with DXM04B0Q firmware
Crucial M500 240GB with MU02 firmware
Seagate 600 SSD 240GB with B660 firmware
OCZ Vertex 450 256GB with 1.0 firmware
SanDisk Extreme II 240GB with R1131
Power supply Corsair Professional Series Gold AX650W
OS Windows 7 Ultimate x64

Thanks to Asus for providing the systems' motherboards and graphics cards, Intel for the CPUs, Corsair for the memory and PSUs, Thermaltake for the CPU coolers, and Western Digital for the Caviar Black 1TB system drives.

We used the following versions of our test applications:

Some further notes on our test methods:

  • To ensure consistent and repeatable results, the SSDs were secure-erased before almost every component of our test suite. Some of our tests then put the SSDs into a used state before the workload begins, which better exposes each drive's long-term performance characteristics. In other tests, like DriveBench and FileBench, we induce a used state before testing. In all cases, the SSDs were in the same state before each test, ensuring an even playing field. The performance of mechanical hard drives is much more consistent between factory fresh and used states, so we skipped wiping the HDDs before each test—mechanical drives take forever to secure erase.

  • We run all our tests at least three times and report the median of the results. We've found IOMeter performance can fall off with SSDs after the first couple of runs, so we use five runs for solid-state drives and throw out the first two.

  • Steps have been taken to ensure that Sandy Bridge's power-saving features don't taint any of our results. All of the CPU's low-power states have been disabled, effectively pegging the 2500K at 3.3GHz. Transitioning in and out of different power states can affect the performance of storage benchmarks, especially when dealing with short burst transfers.

The test systems' Windows desktop was set at 1280x1024 in 32-bit color at a 75Hz screen refresh rate. Most of the tests and methods we employed are publicly available and reproducible. If you have questions about our methods, hit our forums to talk with us about them.