I have a 1 GB Renegade board and downloaded Armbian_19.11.3_Renegade_buster_current_5.3.11 image to install. Noticed it was only 510MB of RAM.
Relevant extracts from serial log:
U-Boot 2017.09-armbian (Nov 19 2019 - 00:09:05 +0100)
Model: Firefly ROC-RK3328-CC
DRAM: 510 MiB
____ _
| _ \ ___ _ __ ___ __ _ __ _ __| | ___
| |_) / _ \ '_ \ / _ \/ _` |/ _` |/ _` |/ _ \
| _ < __/ | | | __/ (_| | (_| | (_| | __/
|_| \_\___|_| |_|\___|\__, |\__,_|\__,_|\___|
|___/
Welcome to Armbian Buster with Linux 5.3.11-rockchip64
System load: 0.10 0.14 0.06 Up time: 2 min
Memory usage: 22 % of 472MB IP: 192.168.11.175
CPU temp: 44°C
Usage of /: 5% of 29G
[ General system configuration (beta): armbian-config ]
Last login: Sat Nov 23 22:48:50 2019
Using armbian-config I downgraded to kernel 4.4.198 and I now have 919MB of RAM.
U-Boot 2017.09-armbian (Nov 19 2019 - 00:01:47 +0100)
Model: Firefly ROC-RK3328-CC
DRAM: 1022 MiB
____ _
| _ \ ___ _ __ ___ __ _ __ _ __| | ___
| |_) / _ \ '_ \ / _ \/ _` |/ _` |/ _` |/ _ \
| _ < __/ | | | __/ (_| | (_| | (_| | __/
|_| \_\___|_| |_|\___|\__, |\__,_|\__,_|\___|
|___/
Welcome to Armbian Buster with Linux 4.4.198-rockchip64
System load: 0.10 0.09 0.03 Up time: 2 min
Memory usage: 8 % of 919MB IP: 192.168.11.173
CPU temp: 43°C
Usage of /: 5% of 29G
[ General system configuration (beta): armbian-config ]
Ray