Finally we have an option to upgrade our sluggish RK3188 limited by the 1gb of ram.
The following seller has the chip to upgrade from PX3 to PX5 for $40:
4 Core CPU
1 GB RAM
16 GB ROM
8 Core CPU
2 GB RAM
32 GB ROM
Very easy plug and play upgrade process, see here:
More information about the upgrade:
I would buy this in a heart beat but I already have a Joying Intel 2gb...