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On 21 October 2021, Sony announced the α7 IV, a mirrorless camera that will support single CFexpress Type A and SD cards. [46]
Why it made the cut: It offers fast read and write speeds at lower prices than the Sony alternative.Overall, the Lexar Gold Series Professional CFexpress Type A Card is a top-performing and reliable memory card option for professional creators who demand the best from their gear. Its fast read and write speeds, sustained performance, and durability make it a valuable addition to any photographer or videographer’s toolkit. Yes. Some controllers do get hot, and would be fine in a computer because there's more airflow, but in a camera, not so much. However, where the Cobalt cards really shine is that ProGrade doesn't just advertise their peak read/write speeds, it actually guarantees the minimum sustained write speed (host device permitting). In this case, that's 1400MB/s - just 100MB/s shy of the 1500MB/s max write rate, which is hugely impressive. Two capacities are offered - 325GB and 650GB - and both are 'reassuringly' expensive for their size, but when has top performance ever been cheap?
The CFexpress Type B USB 3.2 Gen 2×2 Reader is equipped with a USB Type-C interface and comes with an included 2-in-1 USB Type-C to USB Type-C cable and USB Type-C to USB Type-A cable, providing versatile connectivity options. This makes it easy to connect the card reader to a wide range of devices, from laptops to mobile devices. I own one of the 128GB Manfrotto CFe-B cards, which works well on my Nikon D850. It's not quite as fast as my Sony Tough CFe-B card.There are three CFexpress variants: Type A, Type B and Type C. The two newer ones, A and C, were introduced when the CompactFlash Association revised the standard to ‘2.0’ in 2019. On November 10, 2020, Microsoft launched the Xbox Series X and Series S with a slot for semi-proprietary Expansion Cards based on a CFexpress Type B form factor. [44] These Cards only support PCIe Gen4. [45]
AFAIK SSDs in most laptops pretty much just bake in their own heat, they're not actively cooled, even desktop ones aren't really aided by those heat spreaders many come with; most of them will simply throttle when/if they get too hot during sustained operations. It's usually the controller that gets the hottest rather than the NAND so it's also very localized.CFexpress 2.0 type B Gen4 Cards are basically already available in the form of the Seagate Storage Expansion Card for Xbox Series X|S, which are mechanically incompatible to most slots because of their lengthened housing. [5]
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