Upgrade Processor In HP Z620 What kind

I have a HP Z620 with a Xeon E5-1603 with 32GB 1333 memory.  I want to upgrade the processor to a Intel Xeon E5-2670 v2 processor.  Can I do that?  It supports 1866 memory.

Now HP has two links to a pdf that show the supporting CPU and it list this one I want to upgrade to but doesnt list the one I have now.  However If I goto the other page it lists it but doesnt list the one I want to upgrade.

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwiYs9zY_oTYAhWkUt8KHSSECZYQFgg4MAM&url=http%3A%2F%2Fwww8.hp.com%2Fh20195%2Fv2%2Fgetpdf.aspx%2Fc04111527.pdf%3Fver%3D1&usg=AOvVaw3TSkwY1_ChW1p5dROU_Wbd

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&uact=8&ved=0ahUKEwiYs9zY_oTYAhWkUt8KHSSECZYQFghEMAU&url=http%3A%2F%2Fh20195.www2.hp.com%2Fv2%2FGetPDF.aspx%2Fc04111527&usg=AOvVaw2gnNWejockBHiyaioMIoDn