SLI has a host of issues that make it hit or miss, especially on new titles.
In some cases, you might have to wait a week to a month to play a new title with properly working SLI, unless you want to spend 30+ minutes making sure that the workaround you found on google is working properly. Even then, it's still reduced performance.
But, if you are building a PC to play a bunch of games that are unreleased, you might consider waiting until Q3 when new AMD and NVIDIA cards may be hitting. Radeon R9 series (new naming scheme to go alongside their proc naming scheme) is supposed to hit in October. Maxwell might be out in December or January.
Or, just get a hold-me-over card until then and resell it. Like a single 760.
Am thinking of making the jump to 780s... but I'm running an EVGA x58 mobo. The 780s run on PCI-E 3.0, while the mobo is PCI-E 1.0 from the looks of it.
Is it dumb of me to wonder if the 780s are compatible with the mobo given this difference in PCI-E?
Do I need to build a new rig for this switch? Thanks PCGAF!
Your motherboard *should* be PCI-E 2.0
They are not currently bottlenecked by PCI-E 2.0, but they would definitely be bottlnecked by 1.0, and very severely.
With that kind of an upgrade, you might want to look at replacing your mobo/cpu at some point anyway. There's a lot of games that will thank you for it, especially if you play a lot of multiplayer games.