or maybe 2 times DUAL E5-2660V2 CPU on 1 mainboard = 20 cores. Could the Karbo Wallet 1.1.9 be able to recognize 20 cores and let them work?
Use cpumultiminer ou xmr-stack-cpu to mine whit cpu
Exactly, rather than using built-in miner I'd recommend to use some dedicated software, abovementioned or xmrig.