Dual monitors for an AMD A-8 3850 /w Radeon HD 6550D?? Only one screen works.

Considering the specs of the graphic card these are very low and may not support dual screen. But i think you should be able to run them. Can you get another monitor that doesn't require adapter and can you try DVI and HDMI cable and see if you are able to get dual screen.

There may be one other thing we can try before go buying another graphic card. Can you open AMD CCC and see if the two of the monitors are detected or not? And check the whole catalyst control center if there is an option to enable dual screen. It is just that sometimes they are disabled by default.

Then i suspect you need a new graphic card. See when you use 2 screens the graphic card is stressed as it needs to process double of anything, that means double the pixels, double the details and that card has only 512 mb memory so that's why i thought it may not support dual screen and i was right. Mainly 2 GB DDR3 or 1 GB DDR5 is what i atleast recommend for dual screen setup.
Could you tell me your budget and the model of the power supply so that i can suggest a good card?
And i am glad to help you no prob.

Hey, journalist

Damn that is a nice power supply. Hmm i am confused between whether to suggest you r7 260x as it will come in your budget and will be good for video editing or should i suggest you r9 270 which is for 180$ on newegg but will be fully utilized by the apu and also help you in the editing alot (you will never see back to r7 260). Think you can dump a few of those Ram and get 30$ more for r9 270?

Those are nice Ram and will sell for atleast 20$ and i am guarantee you that whatever work you do with 32 gb ram you will not see any lack with 16 gb. And you will be set for r9 270.

And as far as video editing is concerned i don't do much of it to be honest just make game trailers and edit some songs for which i use Camtasia Studio. It is a great tool for small video editing i never tried adobe's. But i will be sure to contact you if i need any big editing.

So let's start with your first question: No, there will be no incompatibility. Take it like that 2.0 is faster and 3.0 is umm you can say a little faster. Take my example I am using R7 250 a 3.0 pci-e card on 1.0 pci-e slot. And my card works just fine. hell i have played battlefield 4 on 30 fps and many other games. So i can guarantee that you will not see any incompatibility whatsoever. And for the speed you won't notice much difference between 2.0 and 3.0.

And as for your second question. You got 32 GB ram and yes it will not be fully utilized since no application i have seen nor any game i have that uses full 16 GB, 32 GB is like totally another story it will take years for games and programs to reach that far. Even Watch Dogs doesn't use that much Ram. So what i am telling you that you are trying to fill a cup that is already filled to the neck. And from my perspective 16 GB is too much i usually recommend 8 Gb but since you do video editing so you might as well keep 16 GB and sell 32 GB that much Ram is totally useless from my perspective and can be sold to buy your new graphic card.

And for your third question. You will be simply be using a unused pci-e slot and you will not be replacing the motherboard's integrated card. And the reason i suggest you the amd card is that first of all you have the amd processor so that means nvidia card could work but you will be seeing problems, few problems installing the drivers since your processor is an APU that requires amd drivers and when you install nvidia drivers it will ask you to uninstall the amd drivers and second of all you can crossfire the apu graphic card means hd 6550D with your r9 270 or r7 260 to give boosted performance. But knowing hd 6550D is not a great card so don't expect too much of a boost. you will get like 5 to 10 fps boost.

And as far as the advice is concerned we are here to give advice and glad you enjoyed it here. Hope you understood my essay above, if don't ask without hesitation i will further provide you with more knowledge. And if you have asked here before building your PC i am sure people here would have provided with much better build and you might have saved a couple of bucks too. But since you have build it there are no worries. I am just saying that 32 gb ram is overkill and selling it would only give you the half price even if they are new.