Isn't it the BIOS that is locking the 4th core on 770/1470 appliances?
I think it is an marketing strategy regarding the S1/S2 series for differentiating the products.
As TAC said, it maybe a trade in upgrade if you want to lift to the 1470 to 1490. (since its factory-locked)
In S1 (730/750/1430/1450) with 2 cores, CoreXL is used for limiting fw worker on 1 core for 730/1430, though the system is operating in 2 cores. If we could do an upgrade an anyway, I think it would be this model (though we can't).
In S2 (770/790/1470/1490), I heard one of the cores are locked in BIOS for 770/1470 so the hardware settings is slightly different. Please correct me if I'm mistaken...
Btw, can you share us how you think the 1490 is powerful than 3100 in many aspects? (is it cited somewhere?)
As in hardware wise, the 3100 with Intel processors seem more powerful compared to SoC on the SMB boxes.
Well, maybe the maintrain OS could be too much for an Atom processor on 3100 