With Quick Sync on the the Intel Pentium G4900 (8th gen, Coffee Lake-S) processor I'm able to handle up to 5 hardware transcodes from HVEC 4K HDR content without any stuttering. :
Amazon.com: Intel Pentium Gold G5420 Dual-Core Coffee Lake Processor 3.8GHz 8GT/s 4MB LGA 1151 CPU Retail : Everything Else
Amazon.com: Intel Pentium Gold G5420 Dual-Core Coffee Lake Processor 3.8GHz 8GT/s 4MB LGA 1151 CPU Retail : Everything Else
Intel officially reveals their Z370 Coffee Lake series of CPUs | OC3D News
Intel Adds New Coffee Lake CPUs to Online Database