The test system used in this review was an HP dc7900. The computer came equipped with an Intel Core 2 Duo E8400 3.0GHz CPU, 2GB of DDR2 800MHz memory, Seagate Barracuda 7200.10 ST3250310AS 250GB SATA hard drive, NVIDIA Quadro FX570 256MB PCIe graphics card, Intel 82567LM-3 gigabit network card and Patriot SuperSpeed USB PCIe host card. For the operating system, I installed a fresh copy of Windows 7 Enterprise.
To test the performance of the Transcend StoreJet 25D3, I ran a series of benchmarks using CrystalDiskMark 3.0, HD Tach RW 3.0.4.0, ATTO Disk Benchmark 2.43 and HD Tune Pro 4.01.
CrystalDiskMark 3.0:
First, I ran a few quick tests using CrystalDiskMark. This benchmark tool measures the performance of a storage device by testing its sequential read and write speeds as well as its random read and write speeds using blocks 512K and 4K in size.
Transcend StoreJet 25D3 - USB 3.0
Transcend StoreJet 25D3 - USB 2.0
The StoreJet 25D3 performed very well when connected to the computer's USB 3.0 port. In our tests, the drive reached speeds as high as 90 MB/s when reading and writing.
HD Tach RW 3.0.4.0:
Next, I used HD Tach to test the StoreJet 25D3's read, write and burst speeds as well as its seek times and CPU usage.
When connected to the computer's USB 3.0 port, the StoreJet 25D3 had average read and write speeds of 75.8 MB/s and 75.1 MB/s, respectively, as well as a burst speed of 121.4 MB/s. The drive wasn't nearly as fast when using USB 2.0 though. Compared to what we saw with USB 3.0, the 25D3's read and write speeds dropped by more than half.
ATTO Disk Benchmark 2.43:
I also used ATTO Disk Benchmark to test the StoreJet 25D3's sequential read and write speeds. The test was run using blocks ranging in size from 0.5KB to 8192KB and the total length set to 256MB.
 Transcend StoreJet 25D3 - USB 3.0 |
 Transcend StoreJet 25D3 - USB 2.0 |
When tested with ATTO, the StoreJet 25D3's read speeds topped out at about 258 MB/s and its write speeds at 149 MB/s when connected using USB 3.0.
