Usage: Gaming on a large screen. Right now it is being purchase with a 23" monitor and I want to use a considerably larger screen in the near future 27"+
Overclocking: Not immediately.
SLI: Yes, 2 cards.
Monitor Resolution:1920x1080 .
Additional Comments: Future proof. I want to make no additions/modifications for three years.
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SB-E is just a waste of money. The 2600K won't bottleneck even 2x590, I think.
"SB-E is just a waste of money at typical monitor resolutions."
There fixed it for you. At Eyefinity/Surround resolutuions there is very real evidence that current x8 lanes do indeed have a very real bottle neck. This was done with GTX480s in SLI. Two years later and we have cards that are 2-3 times as powerful.
Having not only true 40 lanes of pci-e (non-nf200) but also double the pci-e bandwidth so that in 3/4 card setups the cards in the PCI-e 3.0 x8 slots will have the same bandwidth as x16 today.
X79 is an enthusiast chipset and should only be considered by those that are running in a multiple gpus and/or multiple monitors environment. Otherwise I'd agree, it's a waste of money.