That paper is really for IQ 15. Can you send your CFG file?
The system has 40 cores, but IQ sees 80. That's because hyperthreading is turned on. We recommend that HT be turned off or you add this option to your cfg file:
-iqnumbercpus 40
Where 40 is the number of physical cores without hyperthreading.
Seeing your CFG file will help with other options.
Mark