Acer CFE100 512GB CFExpress Type B Memory Card Review



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.  It does not speak to the median or typical temperatures one might expect which would be around the low 30°C mark.  Having said that, the results we obtained from the Acer CFE100 512GB CFExpress Type B memory card fell just behind that of the top cards on the market at 60°C which is very good.


We determine sustained write performance by transferring a 85GB 8K media folder from the PC to the CFexpress Type B card.  This test is vital to those looking at digital storage for high end 4K and 8K video recording.

Although the sustained write performance isn’t what we might see in the higher end competitor cards, it is well above the VPG400 rating of minimum 400MB/s speeds.  This card should have no difficulty whatsoever gaining recordings at the 8K DCI level.


For our Real World File Transfer Comparison of the world’s top CFexpress Type B cards, we have included all cards that we have received to date. This 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.

This poor data transfer speed was rather unexpected, although we did wonder if that low ATTO 512KB data transfer result might provide for this result.

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