Is the footage from the EX1r XDCAM format? If so do a test to Sony .mxf > XDCAM that equals your project.
Then try handbrake on the output file, use the normal profile in HB.
“3 tracks Logos – track effect 2-d shadow”
drop shadows can load the CPU up, a properly functioning GPU assist will speed these calculations. The more advanced the compositing, the long it will take a CPU to render the frame and then pass it to the encoder which also takes time to compress. Grazie is referring to altering your edit so that it reduces complexity of the render.
“3 Tracks – A – B roll – color corrected – track sharpen”
These are fine, but much of what I said above also applies to these plugins. Most of what I see in your system configuration is your Nvidia card not properly performing the GPU assist, and holding you back. The CPU+GPU is used to render the timeline effects, then that frame is passed to the Encoder. The Encoder can utilize the GPU for certain calculations that speed up the encoder. Swapping out your NVidia card for AMD 7970-GHz or even a R9-270X, and you would see a bump in speed for more complex track compositing.
Since your camera shoots XDCAM, not having OpenCL/GPU acceleration enabled, you are missing out on XDCAM playback optimizations in Vegas.
In order of calculation performance
R9-270x (new)
HD7970-ghz (ebay)
R9-290X (new/ebay)
At some point your system/CPU will be holding you back. GPU is not everything, its more like a 4×4 truck or hybrid car. The GPU assists with things it can do faster.
Upgrading the GPU may require a new power supply.