Hi there stevenmc2012,
What seems to be causing the high disk usage? You can check that out in Resource Monitor.
Does this happen when playing that particular game or all the time?
What is your OS?
Have you tried using the drive on another SATA port, that is perhaps, on another controller? You can try that. Also, you can double check the connection and use different cables.
Even though the drive is a new one, it would not hurt to check it's health status out: http://www.tomshardware.co.uk/forum/282651-32-best-diagnostic-testing-utility