Socket 1156 and 1336

Yeah, mostly a structure thing.
However, that structure is giving you more performance in a way.

1366 will give you access to the higher-end CPUs from intel and triple channel memory solutions.

1156 gives you dual channel memory and access to more middle-end intel CPUs.

So, in essence, 1336 will always be better performance when utilized.


edit: typo fix

Right^
Also X58 boards support SLI/CF at dual x16 speed;whereas,P55 board support it at dual x8(or sometimes x16x4) speed and X58 boards tend to OC better than P55 ones.

^+2

^^^^^typo you mean socket 1366  

+1 to all the above

Just remember, a 1156 build will cost less then a 1366 build. And the differences between x16 x16 and x8 x8 are negligible.

Negligible up to a certain resolution, at least. Just most people don't have monitors at that high of a resolution without already investing in a mainboard that gives the best multi-GPU performance (duo-, tri- or quad-x16 PCIe).

The problem with 1156 is that the number of lanes available is limited by the on-die graphics controller. For most people who only use a single discrete card at most (or the onboard GPU at the least), this is not an issue. For enthusiasts who like to hook up mutiple GPUs, this does put a limit as to how much performance they will get out of these boards.

Be aware that sandy bridge will ultimately have the same limitations, so 1366 will still be the enthusiast performance platform of choice in the near future, and 1155 will be the economy and business class for a majority of the Intel builds.

I think all LGA 1366 processors, except the hexacores, have direct counterparts in the LGA 1156 line up.. Also, except a few extra features, the performance across the board is also similar be it for gaming or other works..