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you might find this comparison table useful in your investigations.
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just a small note:
PA6T supports at least 16GB of RAM. Is nemo somehow limited? The comparisson table indicates that maximum is 4GB???
and... ;-)
Memory bandwidth might be interesting to some buyer.
Most have 64bit interface, but IIRC SAM440ep has 32bit interface and x1000 has 128bit (2x64) interface.
and another note:
The x1000 CPU is dualcore, some buyer might be interested to be ready for multicore aware AOS.
and SAM440ep PCI slot is 33Mhz, not 66. The onboard GPU is on the 66Mhz interface of the SoC.