I have a HP Pavilion 550-227c. It has an A10-8850 apu with built-in R7 graphics, paired with a 2GB Radeon R5 330 card set up in dual graphics mode. I'd like to get better performance out of it, and was wondering what the most powerful graphics card is that I could still run dual graphics with. I looked on the dual graphics page, but there is no listing for the a10-8850 apu. also, would it even be worth it to upgrade this setup or should i just invest in a high-end gpu? I mainly want to be able to output 4k (current setup will do this, but it's very laggy and my mouse jumps all over the screen) to my tv that i use as my monitor to watch 4k movies and for general computing (no 4k gaming here). thanks in advance for any advice or tips!