Because with the 1155 board you don't get full X16 speed when you 3 way SLI also i want to ram drive my games for faster load times between areas. there are huge advantages to LGA 2011 over 1155 not only with the CPU.It's been shown graphics cards don't need 16 lanes to operate at high performance
. Yes it's showing a card two generations behind and an interface now a generation behind, but considering at GTX 480 didn't falter between x4, x8 and x16, I don't see how a GTX 680 could falter between x4, x8, and x16 on a PCIe 3.0 slot.
Also RAM drives are hit and miss in games, and according to this post
, doesn't offer that much improvement over a WD Green
drive used as a comparison. And Windows 7 is smart enough to realize if you're running a program or have been running it frequently, it will cache it in RAM. You're better off with a high performance SSD, because then you won't have to deal with having to load your game onto it every time you power on the machine.
The bit above about RAM drives not improving speed much would suggest that we've actually hit a bottleneck somewhere though...