Looks like you got a bit confused over this. Here's the detail:
First of all, to use lucid's solution your monitor needs to always be connected to Intel gfx port, that means when you are just playing games the lucid chip are transferring the framebuffer to the system memory(which intel uses as its graphics memory) from the GPU memory continuously, and the pcie buses are heavily used, this will effect the games, as games like metro require a lot of pcie bandwidth, doubly so for cfx/sli configs as they pretty much strain the pcie bus, also note the data is copied via cpu so this overhead will also decrease the available system memory bandwidth available to the game considerably, which will affect system performance.
As an uncompressed frame(1920x1080) is very large in size it requires a lot of memory bandwidth to transfer it to the system memory via the pcie bus(hence cpu), so the system memory as well as gpu memory performance will suffer under stressing games like metro 2033, crysis etc, this is the sole reason why modern CFX/SLI implementation bypasses the pcie bus and transfers the data via CFX/SLI fingers(bridges), this keeps the pcie bus free to the system and also has very small cpu overhead.
Hope this clears your idea about the technique.
But this will not affect the quicksync as the EUs are directly used and no need to copy the framebuffer, so no loss of performance when using quick sync, but loss of performance when using anything that utilizes the pcie bus heavily.
And this has nothing to do with z68 or overclocking, what I want is the exact opposite of this, allow us to use quicksync and copy the framebuffer FROM the quicksync memory(i.e system RAM) TO the gpu framebuffer, this will hurt quicksync performance but not much as when using quicksync the pcie bus is mostly free and will offer the performance in games, and also the monitor would be connected to the gpu output.
I cant wait another month! Using Vue on my current config is torture! I feel like buying non K version of i7 2600!
