The US70 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 PCIe Gen4 x4 interface, support for NVMe 1.3, 1TB capacity and 5 year warranty.
The US70 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 US70 uses Phison's PS5016-E16 controller chip. This PCIe Gen 4 x4 SSD controller is powered by a dual-core ARM Cortex R5 processor with CoXProcessor technology and supports eight channels with up to 32 chip enables (CE) per channel. The E16 is also compatible with the latest 96-layer 3D TLC NAND flash and offers features like end-to-end data path protection, SmartECC technology and Phison’s 4th Generation LDPC ECC engine for improved drive reliability.
For the 1TB version of the US70, Silicon Power opted to use Toshiba's BiCS4 96-layer 3D TLC NAND flash. Looking at the picture above, you can see two 256GB NAND flash packages on either side of the PCB. The drive also has a pair of 512GB SK Hynix DDR4 SDRAM chips that are used for caching.