Nice! I just ran the same test on my 5.5 Mac Pro 12-core (2x 6-core) 3,46Ghz.
I got 110 Tracks, so this is a nice improvement!
Really like to see what 8-core and 12-cores are doing as I am opting for a 12-core new Mac Pro.
Here is the video showing 309.
Did you run Power Gadget when running the test
Curious to see what the clock was doing.
I've also run Cinebench: