How to get Dell to change my video cards?

Dell is sending me a brand new Alienware m18x with Nvidia SLI configuration to replace my m17x with AMD Crossfire configuration. I HATE Nvidia. I bought AMD cards for a reason. Power and less overheating. Do you think there is any way to call and ask for a Gpu exchange since I use AMD for my graphics designs class?How to get Dell to change my video cards?Yes, Dell will do just about any change that you want. All you have to do is pay for it. If you read the contract is will say that all they are required to do is repair the system and put it back to factory specs.