The test system used in this review is equipped with an Intel Core i7-6700K CPU, GIGABYTE GA-Z170X-UD3 motherboard, 32GB (16GB x 2) of Crucial Ballistix Sport LT DDR4 memory, Samsung 960 PRO 512GB SSD and a GIGABYTE GeForce GTX 1060 WINDFORCE OC 6G graphics card. For the operating system, I used the latest version of Windows 10 Enterprise.

To test the performance of Silicon Power's UD70 SSD, I ran a series of benchmarks using CrystalDiskMark, HD Tach RW, ATTO Disk Benchmark, AS SSD, HD Tune Pro, Anvil's Storage Utilities, Iometer and PCMark. For comparison, I've also included test results from the Samsung 980 PRO, SK hynix Gold P31, Crucial P5, ADATA SWORDFISH, ADATA FALCON, Lexar NM610, Silicon Power P34A60, Patriot P300, Plextor M9PG Plus, Plextor M9PY Plus, ADATA XPG SX6000 Pro, Western Digital WD Black SN750, Samsung 970 EVO Plus, ADATA XPG SX8200 Pro, Crucial P1, ADATA XPG SX8200, Western Digital WD Black NVMe, Samsung 970 EVO, Samsung 970 PRO, Plextor M9Pe, Plextor M8Se, Patriot Hellfire, ADATA XPG SX8000, Samsung 960 PRO, Toshiba OCZ RD400, Samsung 950 PRO, Samsung 870 QVO, Silicon Power P60, SK hynix Gold S31, ADATA Ultimate SU750, Samsung 860 QVO, Samsung 860 PRO and Crucial MX500.

As I mentioned earlier, the UD70 uses Phison's PS5012-E12S controller chip. Looking at the screenshot above, you can see that it performs equally well with both incompressible (0%) and compressible (100%) data.

CrystalDiskMark 5.1.2:

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.

Silicon Power UD70 2TB
Crucial P5 1TB

According to Silicon-Power, the 2TB version of the UD70 is capable of reading at 3,400 MB/s and writing at 3,000 MB/s. While the drive had no problems reaching its rated read speed, it came up a bit short in CrystalDiskMark's sequential write speed test.

Silicon Power UD70 2TB - All 0x00, 0Fill
Crucial P5 1TB - All 0x00, 0Fill

The UD70 performed equally well when using highly compressible 0x00 (0 Fill) data. This time around, the drive was able to read at 3,477 MB/s and write at 2,970 MB/s.

HD Tach RW

Next, I used HD Tach to test the UD70's read, write and burst speeds as well as its seek times and CPU usage.

Looking at the screenshot above, you can see that the UD70 had average read and write speeds of 1,771.0 MB/s and 1657.4 MB/s respectively, as well as a burst speed of 1228.4 MB/s. The screenshot also shows that it uses some sort of SLC caching. The drive starts writing at about 1,700 MB/s and then drops to about 1,600 MB/s when the write operation exceeds the size of the cache.

ATTO Disk Benchmark 4.01:

I also used ATTO Disk Benchmark to test the UD70's sequential read and write speeds. The tests are run using blocks ranging in size from 0.5KB to 8192KB and the total length set to 256MB.

Silicon Power UD70 2TB
Crucial P5 1TB

When tested with ATTO, the UD70's read speeds topped out at about 3.10 GB/s and its write speeds at 2.77 GB/s.