I have completed Doom 3 a long time ago, and it ran fine with MX 4000. Now i was about to buy doom 3 Roe, i tested it in www.systemrequirementslab.com, when i ran the rest the results show my graphics card is not compatible to run the game. Then i ran the test again for doom 3 only, the result was same, but the game ran fine on the same card. What should i do? Should i buy the game, will it work on my pc?