Hi, I have a PC: Ge force 8500GT, 3.25 Gigabytes of ram, Intel Core 2 Duo E7200 2.53 GHz, 720p Monitor, dimension 5100 integrated audio, and I am going to get an LG (http://www.newegg.com/Product/Product.aspx?Item=N82E16827136133#spec) GGC-H20L that comes with Cyberlink Power DVD 7. People were saying that if you have Nvidia you need to buy the purevideo HD codec, is that true?