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09-19-2017, 04:50 PM   #1
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What is fastest SD card compatible with Pentax 645Z?

Will the SanDisk 128GB Extreme PRO UHS-II SDXC Memory Card work?

UHS II SDXC?

Thank you.

09-19-2017, 04:52 PM   #2
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Yes, but in camera it will only use the UHS-I bus. Max effective write speed caps out around 45Mb/s.

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09-19-2017, 05:10 PM   #3
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So in effect, don't waste the money? Just buy a 45meg write speed card? Thanks for quick response.
09-19-2017, 06:51 PM   #4
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QuoteOriginally posted by mtps Quote
So in effect, don't waste the money? Just buy a 45meg write speed card? Thanks for quick response.
Kind of, but cards usually underperform the quoted specs. Optimal performance is offered by SanDisk's extreme pro UHS-1 cards with 95 and 90 MB/s read and write. That would be my recommendation.

SanDisk 128GB Extreme PRO UHS-I SDXC Memory SDSDXXG-128G-ANCIN


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Last edited by Adam; 09-19-2017 at 10:26 PM.
07-27-2019, 11:47 AM   #5
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Is the status quo maintained on the fastest cards for 645Z? Are cards with 90 to 95 MBPS write speed still the most optimal cards for this camera?
08-21-2019, 06:11 PM   #6
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Yes, 645z cannot use the faster speed offered by other cards. The camera supports UHS-I, but the bus speed is capped at around 45MB/s I believe.
09-16-2019, 04:14 AM   #7
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Thanks Manzur
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