I would like to know if its worth upgrading to the GTX680 on my system. I do a fair bit of gaming, etc. but want to make sure I dont bottleneck if I do upgrade. My main concern is my mobo really. Any advice would help. I have been reading other posts on this but would like to know specific to my build
You have a top model cpu in the 2700k so if your motherboard can handle that then it certianly can handle a GTX 680. Your main concern should be with the power supply since that is what well power everything. It will be a good move to get rid of the Rocketfish and go with the Corsair. With the 680 and the 2700k you will be ready to play any game at any settings and resolution.
I know the GTX 680 supports the PCI-e 3.0 but is efficiently backwards compatible with my PCI-e 2.0 (according to many reviews/forums). But I am still unclear: If I were to upgrade the mobo to a 3.0 would I see a dramatic increase in performance?
The pci-e 3.0 is an increase in bandwidth of the pci-e slots so with the newer cards being released it will take a few model releases to notice a bandwith increase. Pci-e 2.0 slots have 500mb/s bandwidth per lane so a 16x slot has 8gb/s gandwidth, the pci-e slots will double that so you havs 16gb/s bandwidth for a 16x slot. You then have to look at the cards output capability to gage if it's going to overload the pci-e 2.0 slot and if it does then you will need the 3.o slot to accomadate the increase in bandwidth.
With the new Pci-e 3.0 slots you need three components , the cpu , motherboard and the video card all to be Pci-e 3.0 ready. So far we have the video card and the motherboard , we are waiting for the cpu. (Ivy Bridge)