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Editor: Julio Franco

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How We Test, System Specs

The Intel SSD 510 Series 120GB, Crucial m4, OCZ Vertex 3, Crucial RealSSD C300 and others feature SATA 6Gb/s connectivity, requiring us to test using the Sandy Bridge (LGA1155) platform. All other 3Gb/s drives were tested on our older LGA1366 platform, but this shouldn't affect the results. A few select SATA 3Gb/s drives were tested on our LGA1155 system to check for accuracy, both synthetic and real-world performance were much the same.

In addition to our featured flash devices, the Samsung Spinpoint F1 1TB 3.5" 7200RPM hard drive has been included for comparison's sake. Our testing suite consists of four synthetic benchmark programs and our own file copying and load time tests.

As you likely know, while manufacturers claim impressive peak I/O performance out of the box, this performance can diminish over time. Unlike a conventional hard drive, any write operation made to an SSD is a two-step process: a data block must be erased and then written to. Obviously if the drive is new and unused there will be nothing to erase and therefore the first step can be bypassed, but this only happens once unless the drive is trimmed.

Considering this, we'll test how much performance you can expect to lose over time. We'll examine all drives in their clean, unused state, and then run the HD Tach full benchmark several times to fill the entire drive. This simulates heavy usage and clearly indicates of how performance will be affected after normal long-term use. All the drives in this roundup support the Windows 7 TRIM function, which is meant to counteract these negative effects.

Test System Specs
- Intel Core i7-2600K (LGA1155)
- x2 4GB DDR3-1600 G.Skill (CAS 8-8-8-20)
- Asus P8P67 Deluxe (Intel P67)
- OCZ ZX Series (1250w)
- Samsung Spinpoint F1 1TB
- Kingston SSDNow V+ 100 256GB
- Patriot Torqx 2 128GB Patriot Pyro 120GB (6Gb/s)
- Crucial RealSSD C300 256GB (6Gb/s)
- Samsung 470 Series 256GB
- Intel SSD 320 Series 300GB
- Intel SSD 510 Series 120GB (6Gb/s)
- Crucial m4 256GB (6Gb/s)
- Kingston HyperX 240GB (6Gb/s)
- Samsung 830 Series 512GB (6Gb/s)
- OCZ Vertex 3 240GB (6Gb/s)
- OCZ Vertex 3 Max IOPS 240GB (6Gb/s)
- Asus GeForce GTX 580 (1536MB)

Software
- Microsoft Windows 7 Ultimate SP1 (64-bit)
- Nvidia Forceware 280.26