There is only 1 PCIe lane and it goes to the USB3 controller. Running from a SSD on USB3 isn't that bad, but they still haven't made default booting from USB po

There is only 1 PCIe lane and it goes to the USB3 controller. Running from a SSD on USB3 isn't that bad, but they still haven't made default booting from USB possible yet. I don't think RAM is an issue though. Performance seems to scale pretty much linearly with clockspeed improvements which indicates either the RAM timing is tied to the clockspeeds (seems unlikely) so bandwidth is increasing or it already has more than it can use. That said, rk3399 designs tend to get about 20% better performance (or around 1gb/s) on synthetics. I'm surprised better IO doesn't exist on the chip if Broadcomm planned on selling it to other customers. I don't think a single SATA port would greatly increase costs, but would have a huge impact on performance. As a final thought, they really need to consider mounting the RAM and CPU on the other side of the PCB. That would allow good cooling solutions that don't compromise the other board functionality.