South Korean memory manufacturer Novachips has introduced two new families of CFexpress Type B memory cards based on the CFexpress 4.0 standard: the Extreme CX4B and the Express CX4B. Both lines are aimed at professional photo and video workflows that depend on sustained write performance rather than short peak speeds, and both have obtained VPG 800 certification, which guarantees a minimum sustained write speed of 800 MB/s when used with compatible CFexpress 4.0 hardware. Novachips should therefore become the first company to combine VPG 800 verification with capacities reaching up to 4TB.

“CFexpress 4.0 represents the next step forward for professional media,” said SJ Yoo, Product Manager at Novachips. “With this launch, we are delivering CFA-certified VPG 800 performance across multiple capacities and memory architectures, giving creators the confidence that their storage will perform consistently in real-world production environments.”

The Extreme CX4B series is available in 600GB and 1TB versions and uses SLC-mode flash memory together with increased internal over-provisioning. Such design reserves part of the memory to help maintain stable write speeds during extended recording sessions and as the card approaches full capacity. Although CFexpress 4.0 cards operate at CFexpress 2.0 speeds when used in current cameras and card readers, Novachips states that the Extreme CX4B models retain VPG 400 certification in this backward-compatibility mode, ensuring a minimum sustained write speed of 400 MB/s even on older hardware. This is not guaranteed across all CFexpress 4.0 cards, making backward performance a notable characteristic of this series.