400
The Lexar 640GB Professional (1800MB/Sec) Type A CFexpress Gold Series Memory Card offers fast and reliable storage. Impressive PCIe 4.0 performance delivers up to 1800MB/s read, 1650MB/s write and sustained write speeds of 1400MB/s for up to 8K RAW video storage without dropped frames. It is IP68-rated for water and dust resistance and is durably built to withstand harsh environments for shooting anywhere.