I don't think the processor fan will spin more than this speed, even I have the i5 series CPU the fan spins under 1000 RPM.
If we compare with other series processor the FAN rPM is less, i think this is the expected speed in i5 series..
Regarding voltage regulator temprature, 80 C is normal temp at full load..
I suggest to download and install the latest IDU from below URL..
This will clarify all your doubts, processor and Voltage regulator temparture will not cross the limit ever.. (older IDU version got few issues)
For me the temprature of the processor went up to 75 C at 100 % load.
Voltage regulator temprature went up to 85 at 100 % load.
With the previous IDU version, i use dto get teh warning msg about the voltage regulatore temp..
However after updating IDU I can see that the voltage regulatore temprature upper limit changed back to 115 and the warning disappeared.
I reccomend you to update the IDU and check is there any temp going above the recommended limit or not?