Like many others i received my 1D X III with a 64 GB SanDisk CFexpress card and a voucher for the SanDisk card reader.
Meanwhile i purchased two different card readers from other brands:
- Delock 91749
- Wise WA-CX01
In principle both readers are working fine on two different Windows 10 machines with a USB 3.1 Type A to USB-C cable.
BUT: even in idle operation (leave card in the reader, no reading or writing) the card is getting
VERY HOT!
That worries me because:
- this unnecessarily drains my notebook's battery
- i'm not shure if it's harmless for the memory card in the long run
I measured a constant 400 mA current draw, that is 2 Watts electric power !!!
I never saw this with any "antiquated" CompacFlash, CFast or SD card, they consume a maximum of about 50 mA during read/write and power down to less than 1 mA in idle state!
The CFexpress card seems to stay cool in the camera and i doubt it consumes that much energy as then the camera's battery would never have that much runtime.
Is anyone else experiencing the same effect?
Could it be Windows-related (can't test with MacOS)?
What if you use a "native" USB-C port?
Is it a problem of the card readers (but as said i tested two different manufacurers) or the card?
What about those of you who have a original SanDisk card reader?