From pcie 2.0 x8/x8 to 3.0 x16/x16 for sli 770

[Braxos]

Hi
I got last week a second 770 with my new pb278q monitor. Now I am thinking if the motherboard p8p67 deluxe with 2600k@4.5 initialize the whole potential of the two dc2oc 770 do to having pcie 2.0 and at x8/x8, since the 770 got a 7000mhz ram clock but the port supports till 5000mhz.

Yeah I know but was thinking if those 5% more from pcie 2.0 to 3.0 and those 5% from x8/x8 to x16/x16 and those 5% from 5000 mhz ram to 7000 mhz could be added to a huge ammount.

If a upgrade was a solution then to what chip? Z77 x79 or z87? Or wait for x89 and new 2011? Cpus will all be K version i7. I only would like chipset rest can find my self I think/ I guess/ I hope.

Thanks

 

[Deders]

It's not the MHz that is the important factor here:

Seeing as PCIe 2.0 @ 8x can transmit 3,200MB/s theoretically (with 20% overhead accounted for) PCIe 3 x16 minimises these overheads to 1.54% and quadruples the bandwidth (8x to 16x + double bandwidth) giving you 15,760MB/s of bandwidth to transfer data from the rest of your computer to the graphics card. Once the data is in the graphics memory the PCIe bus won't have much of a role to play and games will rely on the cards massive 224GB/s which has 14x as much bandwidth as the PCIe 3 slots.

 

[poohbear]

Im curious OP, do u notice ur 770s running slow in pcie 2.0 8x 8x? Its enough bandwidth no? If u go pcie 3.0 can u post if u notice any performance difference?