Hardware And Test Setup
We're using Samsung's 840 Pro MZ-7PD256 for today's testing, based on the company's own SATA 6Gb/s-capable S4LN021X01-8030 NZWD1 (internally known as MDX) controller, sporting a triple-core Cortex-R4 processor. The ASIC is complemented by 512 MB of DDR2 data cache. There are also non-Pro models out there with triple-level cell memory that's neither as fast nor as robust as the 21 nm MLC NAND found in the higher-end drive family. Samsung covers its 840 Pro with a five-year warranty.
Samsung specs the 840 Pro for up to 540 MB/s sequential reads and 520 MB/s sequential writes. It's supposed to achieve 100,000 random 4 KB read IOPS. And, right now, the 256 GB model we're using sells for about $230 on Amazon. You can also find 128 and 512 GB models of this drive, which run about $140 and $460, respectively.
Samsung SSD 840 Pro Technical Specifications
|Form Factor||2.5" (7 mm)|
|Flash Type||21 nm MLC Toggle-mode NAND|
|In The Box||Samsung Magician Software|
Benchmark System and Software
We used our Windows 7-based benchmark system with Gigabyte's Z68X-UD3H-B3 motherboard, an Intel Core i5-2500K CPU, and 4 GB of Corsair TR3X6G1600C8D RAM. The SSD was connected to the first 6 Gb/s port, and we were able to throttle the port to 3 Gb/s in Gigabyte's firmware.
As a basis for comparison, we also added Western Digital's VelociRaptor WD1000DHTZ hard drive. The 1 TB VelociRaptor is a 2.5” drive in a 3.5” format. It’s the fastest disk we’ve ever benchmarked due to its 10,000 RPM spindle and 2.5” platters. Its I/O performance is higher than that of any competing hard drive.
|Benchmark System Hardware|
|Processor||Intel Core i5-2500K (32 nm, Sandy Bridge, D2), 4C/4T, 3.3 GHz, 4 x 256 KB L2 Cache, 6 MB Shared L3 Cache, w/ HD Graphics 3000, 95 W TDP, 3.7 GHz max. Turbo Boost|
|Motherboard||Gigabyte Z68X-UD3H-B3, Revision: 0.2 Chipset: Intel Z68 Express, BIOS: F3|
|Memory||2 x 2 GB DDR3-1333, Corsair TR3X6G1600C8D|
|SSD System Drive||Intel X25-M G1, 80 GB, Firmware 0701, SATA 3 Gb/s|
|Controller||Intel PCH Z68 SATA 6Gb/s|
|Power Supply||Seasonic X-760 760 W, SS-760KM Active PFC F3|
|General Performance||h2benchw 3.16 PCMark 7 1.0.4|
|I/O Performance||IOMeter 2006.07.27 Fileserver-Benchmark Webserver-Benchmark Database-Benchmark Workstation-Benchmark Streaming Reads Streaming Writes 4K Random Reads 4K Random Writes|
|Benchmark System Software and Drivers|
|Software / Driver||Details|
|Operating System||Windows 7 x64 Ultimate SP1|
|Intel Rapid Storage||10|