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The WD Black SN750 comes in a small, black box. Along with a picture of the drive, the front advertises a few of its key features including its 1TB capacity, heatsink and maximum read speed. The back of the box doesn't provide much more in regards to information. However, there is a small window that lets you see the drive and view the model name and serial number. Inside, you'll find the SSD as well as a small guide containing technical support and warranty information.
Physical Features:
As I mentioned earlier, the main difference between this version of the WD Black SN750 and the one we reviewed a few months ago is the addition of a heatsink. Designed by EKWD, the heatsink is made entirely out of metal. It also has a series of fins along the top which increases the surface area for greater cooling.
The heatsink wraps entirely around the SN750 and is attached using hex screws. While this ensures a solid fit, it also adds to the overall width of the drive. Compared to the original SN750, the heatsink equipped version is 2.2mm wider. This doesn't sound like much. However, you will want to make sure that the card doesn't hit a PCI slot or any of the other components on your motherboard. With the heatsink's increased height (8.1mm), you'll also want to be careful that it doesn't interfere with your video card if your motherboard's M.2 slot is below it.
Like the WD Black NVMe, the new WD Black SN750 uses Western Digital's Spectrum (20-82-007011) controller. According to the company, the controller is built on the 28nm process and features a tri-core design. The Spectrum is also equipped with a number of hardware accelerators, or sequencers, that handle things like NVMe command processing, data transfers and both power and thermal management. By offloading these tasks, the controller is able to deliver greater performance, while reducing power usage and latency. To top it all off, the Spectrum supports the latest version of SanDisk's nCache technology which improves sustained write performance by allowing data to be written directly to TLC NAND if the SLC cache is full.
For the 1TB version of the WD Black SN750, Western Digital has opted to use its own SanDisk manufactured 64-layer BiCS 3D TLC NAND flash. If you were to remove the heatsink, you'd see two 512GB NAND flash packages on the top of the PCB as well as a single 1GB SK Hynix DDR4 SDRAM memory chip that is used for caching.
