Originally Posted by acquacow
Different CPUs in the same socket can also have different stack heights, so depending on mounting mechanism, you can easily over-tighten the heatsink on the CPU and break it, or not have enough clamping force to maintain good contact with the CPU.
this series is the same stack heights / nothing's changed other than adding the 2 core's in the CPU itself.
That was one thing i definitely made sure on when I swapped my 930 > X5675
as for looking to see if it'll work - if a 980 or 990x will work (providing the most up to date bios) , a xeon will work in it.