This is my first build and I was wondering what graphics card would be compatible with the AMD A10-5800k APU to use for dual graphics? The motherboard is an MSI FM2-A85XMA-E35 FM2 Trinity AMD A85X (Hudson D4) mATX. Both APU and Motherboard say to use a Radeon HD 7670/6670 graphics card for dual graphics. I found a cheap Radeon HD 6670 2GB GPU by Sapphire, would that work well? Also, before I read all of the compatibility requirements, I had found an MSI Radeon HD 7770 GPU. Would this also work even though it is a 7770? The MSI GPU is also GDDR5, would that still be compatible with my motherboard? Any other recommendations and suggestions would also be appreciated. Thanks for the help!