well i was thinking about making a pc with an i5k ivybridge and an asus p8777 v pro, but then i saw something like the x79 ud3 and the 3820 and wondering . the pcie slots could be usefull and would ensure more future proofing , so is it worth it?
The efficiency of the Ivy Bridge chips is giving a tough time to the processors from the 2011 slot from the prior generation.
There is to be a new sort of 2011 processor sooner or later whereas there is to be no more new 1155 processors, so that could make a difference.
Anyway, the 2011s used to be king of the hill and that is why they costed so much. They are still the king of the hill if you get the $1000 processors, but the cheaper ones are beaten $ for $ by Ivy Bridge I am pretty sure.
Anyway, my vote would be for the 1155 unless you have many many hundreds to drop on the processor alone. Not just 2, I am talking like 5+.
I would mostly ignore the concept of future proofing, it doesn't work and even when it does it isn't cost effective.
Personally, the IB is fine'ish, my only complaint is it's high temps from IMO poor choices from Intel - cheap TIM and Tri-Gate design. My hope is the IB-E has these issues corrected and ALL 8-cores are enabled.
That said, for the 'A-Typical' person IB + Z77. CPU: i5-3570K and MOBO: ASUS P8Z77-V PRO (NewEgg is offering 4 yr warranty) or ASUS Sabertooth Z77 (5 yr warranty).