Joe Rock :
you mean 6570 is better than the integrated graphics, right? coz I'm gonna pull this thing out if its not. BTW, I can't find disable integrated graphics on MSI bios.
Addtn: I bought this thing because the amd site said my processor can use dual graphics with 6570.
I took a look at the specs of your AMD A8-5600K CPU.
It contains a Radeon HD 7560D integrated GPU.
Do you mean CrossfireXing both the Radeon HD 7560D and the HD 6570?
Or do you mean using each graphics device separately for two independent monitors?
As for CrossfireXing, I don't believe you can can CrossfireX these two because there are from two different generations. It has to be in the same generation.
UPDATE:
Nevermind, it looks like CrossfireX compatibility is different for integrated AMD GPU and AMD GPU cards so it does work. I found a link that talks about it. "As of 2012, it seems that this "Hybrid CrossFireX" is called "Dual Graphics". Basically it is CrossfireX using an integrated AMD GPU and a discrete AMD GPU card.
As for performance, the AMD HD 6570 discrete graphics card has a 14% better performance. I use this card for playing Blu-ray movies and it is fine.
I use an Intel HD 4000 integrated graphics and an AMD HD 6570 discrete graphics card so you are lucky you can CrossfireX these two for extra performance boost. I bought several HD 6570 cards for HTPCs and you could CrossfireX up to 4 of these in the same system. So theoretically you could buy (3) more HD 6570s if you got (4) total PCIe 2.0 slots on your motherboard and CrossfireX all of them. The HD 6670 is a better performer but most of these are dual slotted so much more difficult to find a motherboard to accommodate more than two of these at a time.
I hear about CrossfireX performance gains are about 70% of its original performance for each additional card and people have experienced microstuttering in their games.
If you experience this at all, I'd disable the integrated AMD HD 7560D and run off just the HD 6570 only.
To do this in Windows, Right click the "My Computer" icon to go into the "Device Manager", under "Display Adapters", listed next to the AMD Radeon HD 6570 will be the AMD Radeon HD 7560D. Right click on the AMD Radeon HD 7560D and click Disable. Reboot and it should use only the AMD Radeon HD 6570 for all your software applications. Reboot the computer but make sure you have only "ONE" display connector hooked up to the rear of the HD 6570 graphics card. This will avoid any confusion as to which connector it will use for the primary display adapter.
Afterwards in the BIOS you can also select the Primary Graphics as PCI, PCIe, AGP (on older systems) or integrated graphics in most BIOSs. But even selecting PCIe in my BIOS doesn't turn off the Intel HD 4000 from showing up in the Device Manager. If you want to be rid of an integrated GPU from being detected or using any power at all it is better to get a pure CPU without any integrated GPU.