ProGrade Digital has announced a 512GB version of its Cobalt UHS-II SDXC memory card, which offers maximum read and write speeds up to 300MB/s and 250MB/s, respectively.

This new 512GB Cobalt SD card offers V90 performance, guaranteeing the minimum write speeds never drop below 90MB/s, an important specification for times when you’re recording high bit-rate video directly onto the card. ProGrade Digital, which was founded by industry veterans from Lexar and SanDisk, says each component of the card is tested ‘down to individual memory chips’ to ensure the best performance and reliability possible.

The 512GB Cobalt SD card is both X-ray and shockproof, and capable of operating between -25ºC (-14ºF) and 85ºC (185ºF). It also features built-in error correction that detects and corrects data write and data transfer errors.

The ProGrade Digital 512GB UHS-II SDXC memory card is available to pre-order for $460, which amounts to roughly $.90/GB. There are also 256GB, 128GB and 64GB models available, but those have been available for well over a year now.