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by dijit 884 days ago
most SOC CPUs don't really have a huge PCIe capability to begin with- possibly 1 or 2 lanes total; and you probably want USB, Ethernet etc;

You wouldn't get very much performance anyway, as you only want many PCIe links in order to get bandwidth through them which you're unlikely to do on an anaemic CPU.

to-wit: you wouldn't get good NVMe performance even if you had the pinouts and the CPU had 4x Lanes of PCIe anyway.

2 comments

just having 1 or 2 lanes of gen 3 with an m.2 would be really nice. 2 gen 3 lanes gives you 2gbps which isn't fast compared to the 4 gen 4 lanes on modern ssds, but it's fast enough that it won't slow down the rest of the system.
> you wouldn't get good NVMe performance even if you had the pinouts and the CPU had 4x Lanes of PCIe anyway.

... compared to eMMc or sata over usb? You won't get the full performance of the ssd, but i guarantee it will be much better.