What is the fine-grained topic of the following text: The 970 PRO combines the next-gen PCIe Gen 3x4 NVMe interface with the latest V-NAND technology and a newly enhanced Phoenix controller to achieve fearless read/write speeds up to 3,500/2,700 MB/s*, approximately 30 percent faster than the previous generation. Only return the topic.
Samsung 970 PRO SSD Performance and Specifications