The UD70 comes in a small, black and white box. In addition to a plastic window which lets you see what the drive looks like, the packaging advertises some of the drive's key features including its 2TB capacity, support for NVMe 1.3, and 5 year warranty.
The UD70 uses the 2280 form factor for M.2 (NGFF) SSDs. It measures 22 x 80 x 3.5 mm and weighs in at 8g. The drive also has an "M key" edge connector which provides PCIe SSDs with up to 4x lanes of bandwidth.
The UD70 uses Phison's PS5012-E12S controller chip. This PCIe Gen 3 x4 SSD controller supports eight channels with up to four chip enables (CE) per channel. The E12S is also compatible with 3D TLC/QLC NAND flash and offers features like end-to-end data path protection, thermal monitoring, SmartECC technology and a low-density parity-check (LDPC) ECC algorithm for improved drive reliability. The controller also supports AES-256, TCG Opal, and TCG Pyrite encryption along with APST, ASPM, and L1.2 power saving modes to maximize notebook battery life.
For the 2TB version of the UD70, Silicon Power opted to use Micron's 96-layer QLC NAND flash. Looking at the picture above, you can see that there are four 512GB NAND flash packages on the top of the PCB. The drive also has a single 512GB DDR3L DRAM chip that is used for caching.