This is not supported and does not work.

thank you!

I suspected I was barking up the wrong tree - no fool like a 74 yr old fool eh?

A Brazilian expert uploaded video of updated dell Vostro 260s  Motheboard  0gdg8y installed Xeon E3 1270 and system running like charm.

   here is link::https://www.youtube.com/watch?v=eogmAioOoeQ

https://www.youtube.com/watch?v=eogmAioOoeQ

Xeon E3 1270 CPU Works on Dell Vostro 260s, this video uploader Washington luiz told me to install Graphic card and Done

Genuine Dell GDG8Y, M5DCD, MIH61R Inspiron 620s would not take xeon out of the box.  And I do not know if the microcode for the multiple cores and turbo boost works or not.

At a minimum you would have to cut the ears from the socket because XEON cpus will be blocked from going into the socket 1155 H2 .

LGA 1155 has 1155 protruding pins to make contact with the pads on the processor. The pins are arranged in a 40×40 array with a 24×16 central void and additional 61 omitted pins (two adjoining the central void, six in each of the four corners, and 35 in groups around the perimeter), yielding the 1600 − 384 − 61 = 1155 pin count. Processors for LGA 1155 and LGA 1156 sockets are not compatible with each other since they have different socket notches. To get around this people cut the notches off.

Socket 2011
Socket 1366
Socket 1155
Socket 1156
Socket 775

yes, Xeon E 1270 is working fine with Nvidia GT on my Dell Vostro 260s........Xeon E3 sandy Bridges are working but Ivy bridges are not