AMD HDMI issue

[superbikerider69]

Hi all,

I am having an issue with my son's pc

He has had it 18 months and its worked with no problems. It has an AsRock FM2A75 Pro 4 motherboard and onboard 8570d graphics and seperate 6670d graphics card to work in crossfire

We always had the HDMI cable in the motherboard port and it worked. My son was downloading something last night and the pc crashed - when booting up the pc booted up all ok but we had black screen on the monitor.

To get it working i took out the graphics card, then the bios battery for 10 seconds and put it all back together, i then booted it back up with the hdmi cable in the graphics card port and again it lookd like black screen so i pressed a reset button under the power on button on the tower and the screen came on

Then when it booted up the AMD graphics manager came up asking to update and we did that which took ages

We now have both the 8570 and 6670 enabled as crossfire and it works when the cable is in the 6670 port but no signal from the 8570 motherboard port

Obviously its all working now from the graphics card but i cant understand why i have no signal from the motherboard port any more

Is it something to worry about - can hdmi ports just stop working?

I am confused!!

 

[millwright]

I'm guessing you weren't using the 2 dedicated cards at all.
And now you are.

If you had 2 dedicated card in cross fire, I can't see any reason what so ever to be plugged into the motherboard.

You were using the onboard video and the 2 dedicated cards were just sitting there, doing nothing.

Some boards can share onboard with dedicated, but only on a low level.

 

[millwright]

Rather the onboard will work with the dedicated is entirely up to the motherboard, some will at low levels, and some won't at all.

 

[superbikerider69]

ok, thanks for that

so maybe after the crash the bios had changed and made me use the card slot and set it up properly?!

i have looked at the bios and the default graphics is pci - maybe that was motherboard before?

 

[millwright]

I'm guessing something like that.

If you removed, or reset the CMOS jumper.(dose exactly the same thing)
It would set the BIOS to default.

It doesn't necessarily stick to default, if it doesn't find the default graphics card, it will look for another.

PCI dose not necessarily mean on board or dedicated. What were the other settings? Onboard can be PCI,AGP, or PCI-e.
Was it PCI-e maybe?

As I said some boards can use a dedicated card, and onboard in crossfire/SLI.

Once you get to a certain level card that stops.
I would think your crossfire is above any collaboration with the onboard, if it could do it in the first place.

In those cases the monitor has to be plugged into the dedicated card anyway.

 

[millwright]

Your gaming should improve drastically.

 

[superbikerider69]

thank you for all your help