Might be a feature despite Ark claiming 2133...Thank you very much for clarification.
Do you think this is ES/QS limitations or E5-2650 V3 feature?
Intel Xeon E5-2600 v3 "Haswell" Processor Review | Microway
- Entry-level “Basic” CPUs now support 1600MHz memory (a 20% increase)
- Mid-level “Standard” CPUs now support 1866MHz memory (a 16% increase)
- Higher-end “Advanced”, “High Core Count” & “Frequency Optimized” CPUs now support up to 4 DIMMs per socket at 2133MHz (a 14% increase)