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Our testing methods
Unfortunately, we don't have any other 512GB SSDs in the Benchmarking Sweatshop. We have tested a number of 240-300GB drives based on SandForce, Marvell, and Intel controllers. Those SSDs all have higher-capacity counterparts, but they aren't tagged with substantially superior performance ratings for reads or writes. In most cases, the performance specifications are identical, so we should have a good look at how each family of drives performs in its optimal configuration.

Interface Cache Spindle speed Areal density Flash controller NAND
Corsair Force Series 3 120GB 6GBps NA NA NA SandForce SF-2281 25-nm Micron async MLC
Corsair Force Series 3 240GB 6Gbps NA NA NA SandForce SF-2281 25-nm Micron async MLC
Corsair Force Series GT 120GB 6GBps NA NA NA SandForce SF-2281 25-nm Intel sync MLC
Corsair Force Series GT 240GB 6GBps NA NA NA SandForce SF-2281 25-nm Intel sync MLC
Corsair Performance 3 Series 128GB 6GBps 128MB NA NA Marvell 88SS9174 34-nm Toshiba MLC
Crucial m4 128GB 6GBps 128MB NA NA Marvell 88SS9174 25-nm Micron sync MLC
Crucial m4 256GB 6Gbps 256MB NA NA Marvell 88SS9174 25-nm Micron sync MLC
Intel 320 Series 120GB 3GBps 64MB NA NA Intel PC29AS21BA0 25-nm Intel MLC
Intel 320 Series 300GB 3Gbps 64MB NA NA Intel PC29AS21BA0 25-nm Intel MLC
Intel 510 Series 120GB 6GBps 128MB NA NA Marvell 88SS9174 34-nm Intel MLC
Intel 510 Series 250GB 6Gbps 128MB NA NA Marvell 88SS9174 34-nm Intel MLC
Kingston HyperX 120GB 6GBps NA NA NA SandForce SF-2281 25-nm Intel sync MLC
OCZ Agility 3 120GB 6GBps NA NA NA SandForce SF-2281 25-nm Micron async MLC
OCZ Octane 512GB 6Gbps 512MB NA NA Indilinx Everest 25-nm Intel sync MLC
OCZ Vertex 3 120GB 6GBps NA NA NA SandForce SF-2281 25-nm Intel sync MLC
Seagate Momentus 5400.4 25GB 3Gbps 8MB 5,400 RPM 204 Gb/in² NA NA
Seagate Momentus XT 500GB 3Gbps 32MB 7,200 RPM 394 Gb/in² NA* 4GB SLC
Seagate Momentus XT 750GB 6Gbps 32MB 7,200 RPM 541 Gb/in² NA* 8GB SLC
WD Caviar Black 1TB 6Gbps 64MB 7,200 RPM 400 Gb/in² NA NA
WD Scorpio Black 750GB 3Gbps 16MB 7,200 RPM 520 Gb/in² NA NA

Our performance data also includes a number of lower-capacity SSDs and a handful of more traditional hard drives. I've grayed out the latter in the chart and in the graphs on the following pages to focus our attention on how the Octane fares against its solid-state competition. Neither the mechanical drives nor the hybrids are in the same league, at least in terms of performance. If you want to see some real carnage, watch for how the Octane's performance compares to that of our 3.5" desktop reference, the Caviar Black 1TB.

We used the following system configuration for testing:

Processor Intel Core i7-2500K 3.3GHz
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 Series 3 120GB with 1.3 firmware
Corsair Force 3 Series 240GB with 1.3.2 firmware
Corsair Force Series GT 120GB with 1.3 firmware
Corsair Force Series GT 240GB with 1.3.2 firmware
Crucial m4 128GB with 0009 firmware
Corsair m4 256GB with 0009 firmware
Intel 320 Series 120GB with 4PC10362 firmware
Intel 320 Series 300GB with 4PC10362 firmware
Intel 510 Series 120GB with PPG4 firmware
Intel 510 Series 250GB with PWG2 firmware
Kingston HyperX 120GB with 320ABBF0 firmware
Corsair Performance 3 Series 128GB with 1.1 firmware
OCZ Agility 3 120GB with 2.15 firmware
OCZ Vertex 3 120GB with 2.15 firmware
WD Caviar Black 1TB with 05.01D05 firmware
Seagate Momentus 5400.4 250GB with 3.AAB firmware
Seagate Momentus XT 500GB with SD22 firmware
WD Scorpio Black 750GB with 01.01A01 firmware
Seagate Momentus XT 750GB with SM12 firmware
OCZ Octane 512GB with 1313 firmware
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. The Hybrid drives have also been subjected to five runs, but only in tests that show their performance improving after the first one.

  • 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.