It's on socket 2011, not 1155.
Performance wise they are similar
Here is 2600k vs 3820 comparison. You will see there is negligible difference between the two even though 3820 stock speed is higher
http://www.anandtech.com/bench/Product/287?vs=523
However you haven't mentioned if you need a new motherboard aswell.
Hey thanks for the link,
Yes i'm on phenom 960t and it's starting to fall behind in a few things so need processor and board

Was looking at the msi big bang and 2700k got them in my basket ready to buy just seeing if any other offers pop up today.
