The Seagate FireCuda 520 is a solid-state drive in the M.2 2280 form factor, launched in 2021. It is available in capacities ranging from 500 GB to 2 TB. This page reports specifications for the 2 TB variant. With the rest of the system, the Seagate FireCuda 520 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the PS5016-E16-32 from Phison, a DRAM cache chip is available. Seagate has installed TLC NAND flash on the FireCuda 520, the flash chips are made by Unknown. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The FireCuda 520 is rated for sequential read speeds of up to 4,850 MB/s and 4,750 MB/s write; random IOPS reach up to 800K for reads and 950K for writes.
The SSD's price at launch is unknown. The warranty length is set to five years, which is an excellent warranty period. Seagate guarantees an endurance rating of 1200 TBW, a typical value for consumer SSDs.