About the ratio vcpu to pcpu, since you have 16 cores that would be 4.3:1 (70/16). Hyperthreading is not real cores so they do not count.
But that is still fine.
I would have a look at powersettings on your host, make sure its not set to balanced or something similar. It should be set to "high" or "Performance".
Also in the ESX settings it should be set to "high"
The next thing would be to look at storage, this is the most common reason for sluggish user experience.
The bottom line is that no, moving to 2 vCPUs will not help with this. 6:1 usually is fine, but YMMV - it all depends on user workload.----
Jack McMichael | Sr. Systems Engineer
VMware End User Computing
Contact me on Twitter @jackwmc4
I know where the BIOS settings are for high performance, however where are the High settings for ESXi you speak of located in the C# gui? Thank you
Just as I thought, the properties button is greyed out, i guess that means I have it disabled somewhere? Or perhaps it is picking up from the Dell bios it is disabled?
On our 820's, once changed in BIOS to High performance (or whatever it's called), option in vsphere became grayed out.