When it comes to memory, we have a Hynix 1TB SK chip,possibly SK Hynix'snew 4D NAND, which overlays your memory cells in 128 layers. And all of this sits on a printed circuit board that uses the CFexpress connection pattern. This standard being entered in the market uses, in addition to NVM Expressprotocols, the PCI-Express 3.0 connection interface with 1 to 4 channels - data up to 1GB/s can be provided per channel. This combination of technologies allows the card to offer low overhead and latency, as well as much faster read and write speeds (up to 4 GB/s). CFexpress - All about the new pattern of much faster memory cards As Jeff Grubb mentions, 4GB per second would give enough margin to the Phison E19T controller, which reaches a maximum of 3.75 GB/s for read/write speeds.