Hi i am building a system together with the mainboard asrock b450 pro4 (ATX) g skill ddr4 8gb
And a ryzen 3 2200g power supply bequiet straightpower 400watt

My problem is now that the mainboard ran the first day perfectly with two graphics cards and on the other day it has suddenly shown no more picture then I have replaced all the usual things and checked but none of the said hardware was broken then I sent the mainboard back to the manufacturer and they write that they have found no errors and sent me back again. Then i thought ok then maybe the fault has been fixed somehow i plug everything in i turn the system back on and it shows picture with integrated graphics card then i plug the first gpu back in it still shows picture i plug the second gpu in and it doesn't show anything then i unplug the second gpu and it still shows picture. second gpu out again and it also shows nothing and then the first gpu out and it shows nothing so exactly the same error as before no matter what i do it shows nothing and i am getting desperate because i have changed all hardware to something i had lying around but it just won't work
And apparently no one on the internet has the same problem.

Question

Hi i am building a system together with the mainboard asrock b450 pro4 (ATX) g skill ddr4 8gb
And a ryzen 3 2200g power supply bequiet straightpower 400watt

My problem is now that the mainboard ran the first day perfectly with two graphics cards and on the other day it has suddenly shown no more picture then I have replaced all the usual things and checked but none of the said hardware was broken then I sent the mainboard back to the manufacturer and they write that they have found no errors and sent me back again. Then i thought ok then maybe the fault has been fixed somehow i plug everything in i turn the system back on and it shows picture with integrated graphics card then i plug the first gpu back in it still shows picture i plug the second gpu in and it doesn't show anything then i unplug the second gpu and it still shows picture. second gpu out again and it also shows nothing and then the first gpu out and it shows nothing so exactly the same error as before no matter what i do it shows nothing and i am getting desperate because i have changed all hardware to something i had lying around but it just won't work
And apparently no one on the internet has the same problem.

Answer

Hi, Kai, I also bought this board, but I use it in a totally different configuration. (Ryzen5 without GPU) only a graphics card Nvidia GTS 1050, 16 GB RAM.  First the question: If you plug in an external graphics card and write that it works, do you have the monitor connected where? To the external graphics card or to the graphics card of the board/APU? I know that as soon as a graphics card is plugged in, the internal graphics are switched off, so that I still have a picture, I have to reconnect the monitor. If I plug in a second graphics card externally, I probably have to connect another monitor to see if there is a picture there. All this with the caveat that drivers and monitor configuration have to be set up after booting the operating system. With some boards I can switch on the internal graphics card in the BIOS, so that one or possibly 2 monitors can be connected there. You want to use 3 graphics chips at once, what is your idea behind this? The use of 2 plugged-in graphics cards is often used by gamers who then connect them together (SLI) to get higher frame rates. Otherwise, with 3 graphics chips I can possibly operate 6 monitors - is that what you want?
Kind regards Mischi237

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