CFexpress cards are everywhere now, so a manufacturer launching a new card needs something special to stand out from the crowd. Headline maximum read/write speeds are often the go-to marketing win, but with its new Pro-Cinema line, SanDisk is focussing not on maximum transfer speeds, but the cards' minimum sustained write rate.
Although great for news headlines, peak read/write speeds matter much less in real-world scenarios. On the other hand, sustained write speed is far more critical, especially when recording high resolution, high bit-rate video which demands extended periods of fast write speed. To that end, the SanDisk Pro Cinema card is rated for an impressive 1400MB/s minimum sustained write speed. This in turn qualifies the card for VPG400 certification and SanDisk claims Pro-Cinema cards are fast enough to record 8K video "flawlessly".
