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TEMPS, SUSTAINED WRITES AND TRUE DATA TESTING
TEMPERATURES
Two characteristics that became very important with the introduction of CFexpress as a mainstream storage medium were temperature and sustained write speeds. We measure temperature by monitoring and updating a Crystal DiskInfo Benchmark while a large 85GB 8K file transfer is being performed. This is the extreme of what one might see in this environment. An important aspect to remember is that the temperature results we obtain are the extreme. They are the hottest the card got during any period of our testing which was constantly monitored.
The Lexar Professional CFExpress 4.0 Type-A 2TB Memory Card reached a temperature high of 76°C. This may seem high, but when considering this cards small size and the speeds we are pushing through it, this is expected.
SUSTAINED WRITE PERFORMANCE
We determine sustained write performance by transferring a 85GB 8K media folder from the PC to the CFexpress Type-A card. This test is vital to those looking at digital storage for high end 4K and 8K video recording.
The advertised sustained write performance for the Lexar Professional SILVER CFExpress 4.0 Type-A 2TB Memory Card is 1.3GB/s and it hit that dead on. This is also the highest result we have had to date.
REAL WORLD FILE TRANSFER COMPARISON
Our Real World File Transfer Test is conducted through the transfer of data from one spot on the test drive to another to give us the truest of transfer speed results for that device.
The Lexar Professional SILVER placed first ahead of both the Lexar and previous Gen ProGrade Type A cards.
REPORT ANALYSIS AND FINAL THOUGHTS
Content creators, and anyone who loves great photo or video, tend to stick with their brand. Canon fans stay with Canon, Sony fans swear by Sony, and Nikon… well, Nikon… Zzzzz. (See what I did there? A little nod to the Z series.) But seriously, I’ve never understood how Sony shooters have tolerated the sluggish Type A storage cards for so long. I shoot with a Canon R5, and it’s easy to see why it’s become the go-to camera for so many professionals. Sure, my storage can run a little warm sometimes, but I absolutely love this camera. Anyway… back to Type A.
It’s fantastic to see advancements in flash technology finally push Type-A memory cards to a massive 2TB capacity, something that’s been long overdue. Even better, the move to USB 4.0 has brought much-needed improvements in data transfer speeds for Type A. In our testing, we measured performance just shy of 1.7GB/s, with sustained write speeds reaching an impressive 1.3GB/s.
So, we now have a high-capacity solution with impressive speeds and a lifetime warranty; great news for all the Sony enthusiasts out there. But what about the price? Surprisingly, it’s much better than expected. You can grab this card on Amazon for just $595, complete with free and fast shipping. The Lexar CFExpress 4.0 Type-A WF730 reader is also available for $99.99, and there are even bundle options for both.
One final note, if you want to hit the performance numbers we showcased here today, you’ll need the full setup: a PC with true PCIE/USB 4.0 support (not 3.2), a genuine USB 4.0 card reader, and of course, a USB 4.0 capable card. Miss any one of those, and frustration is pretty much guaranteed. Editor’s Choice!
CHECK LEXAR SILVER CFEXPRESS A 2TB CARD PRICING AT AMAZON
