Andy,
Go to our Premiere Pro BenchMark (PPBM) web site and download the Benchmark and run it on your system. From it we can see how well your system is setup and tuned for the very demanding Premiere and your media. To see the Benchmark Results page you will have to register on the site. There are four basic tests, from the results we can see how well the CPU, GPU and Disk system perform and we get a great description of your hardware.