the 7601s don't operate at 1.9ghz. those are a base stepping for the B2 ES samples I have. however, they typically average 2.2ghz. AMD's clocking is ALL OVER THE MAP with these processors. esp. if lightly threaded. I've seen 2.7ghz as well.
all memory is DDR4-2667 ECC/REG so, there is a small tick in latency due to ECC but otherwise, they're stock Samsung DIMMS
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