Rock Pi 3A RAM is only 1.5G

The display memory received after purchase is 1.5g1 2

Is there a problem with all batches of this product or why?

If you bought 2G version, then you will only have 1.5G since 0.5 is eaten by the gpu subsystem and can’t be used by cpu in any way.

To see total memory use

lshw -c memory


awk ‘/MemTotal/ {print $2}’ /proc/meminfo

I have run lshw -c memory ,but i get the message is still 1.5G, look up screenshot
3 4

The on board NPU eats about 500MB ram, if you don’t need it, you can disable the NPU. We will update a dts overylay to disable it.

you can disable the NPU
how to do it?