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Raspberry Pi OS • Re: Pi5-16GB performance issue with NVME data disk

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As I see it, a possible difference between the 8GB and 16GB models is the D0 stepping of the latter. The new stepping is rumoured to be required for addressing 16GB RAM.

Is it possible something at the driver level adds the equivalent of a bounce buffer?

I'd try mem=8G on the Linux command line to see if that makes any difference. It may not.
Great suggestion! Tried mem=8G. Unfortunately, no joy:
Pi5-8GB N04: 2min 8sec (N04)
Pi5-8GB: 2min 20sec (X1001)
Pi5-16GB: 3min 35sec (N04)
Pi5-16GB (w/mem=8G): 3min 41sec (N04)
I view mem=8G not speeding things up as a good thing, since one is looking for a solution allowing use of all 16GB of RAM.

Following the thread

viewtopic.php?p=2285726#p2285726

I wonder if changing the EEPROM from default to the latest would make a difference.

Statistics: Posted by ejolson — Thu Jan 16, 2025 1:22 am



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