Motherboard not detecting GPU

J

Japster

Well-Known Member
Joined
Mar 6, 2009
Messages
468
Reaction score
0
Location
Johannesburg
My mate got a new motherboard ASUS ROG Strix B250F, but for some reason it does not detect his GPU (Gigabyte R9 280x). The GPU does work as it comes out of his older PC, with the PSU (750W) from the older PC. Tried another GPU (NVIDIA GT710) on the motherboard and it worked fine. The fans of the R9 spins, but there the screen does not get a signal. Any advice or suggestions?
 
Japster said:
My mate got a new motherboard ASUS ROG Strix B250F, but for some reason it does not detect his GPU (Gigabyte R9 280x). The GPU does work as it comes out of his older PC, with the PSU (750W) from the older PC. Tried another GPU (NVIDIA GT710) on the motherboard and it worked fine. The fans of the R9 spins, but there the screen does not get a signal. Any advice or suggestions?
Click to expand...

Drivers? He will have to use the on board GFX to install the drivers first maybe?
 
Japster said:
My mate got a new motherboard ASUS ROG Strix B250F, but for some reason it does not detect his GPU (Gigabyte R9 280x). The GPU does work as it comes out of his older PC, with the PSU (750W) from the older PC. Tried another GPU (NVIDIA GT710) on the motherboard and it worked fine. The fans of the R9 spins, but there the screen does not get a signal. Any advice or suggestions?
Click to expand...
1) Maybe a weak power rail on the PSU. Does the card have 2x 6 pin ports? Maybe try 1 from each rail to split the load. That being said, the PSU should be more than sufficient. Maybe a bad contact? Are there green status LEDs next to the power ports on the card which confirm a good connection?

2) Does your PC have onboard graphics? Maybe the motherboard is still sending the display signal to the motherboard's onboard HDMI port instead of the graphics card. If this is the case, it will need to be changed in the bios.

3) Perhaps the reason that the display works with an older graphics card is that the bios doesn't recognise the newer R9. Maybe your BIOS could use an update.
 
@Pitbull
If the card does not get detected in the BIOS, I have to connect the screen to the onboard graphics. Would that not mean I cannot install the AMD drivers since the motherboard does not pick up the GPU?

@Bromster
When you say split the load what do you mean by it. The card uses a 6 pin and 8 pin, of which the psu has those connectors. So how would I use a connector from each rail. Sorry if this is a noob question, I just have no idea how to do something like that.

Yes the motherboard does have integrated graphics. If I go into the BIOS and change the primary graphics from AUTO to PCI, Save exit, connect the screen to the GPU, there is still no output from the screen. I would have thought since the board is new, the age of the card would not be the issue since it is a couple of years old. But I will check for a BIOS update for the motherboard.

Will try your suggestions tomorrow and see if it works.
 
@Japster The PSU usually has 2 seperate sets of power cables (aka. 12v rails) to use for powering drives etc.

If you are plugging a lot of things into one set of cables, you might be running out of power for your graphics card. Especially if you are using a 6 pin and an 8 pin from the same set of cables, whilst the other set of cables is doing nothing.
 
Also worth noting:

I have had this problem with my i5 3570k and the integrated HD4000 graphics:

1) I used onboard graphics to get into Windows and install my graphics card drivers.

2) set my primary graphics to PCI-Ex in the BIOS.

3) Black screen as soon as I reach the windows login screen.

The reason for this was that the CPU's integrated graphics driver was now conflicting with my graphics card driver. I disabled the Intel HD Graphics through the device manager in safe mode, then it was fine.


^ If your BIOS still doesn't read your Graphics Card, I don't think we have reached this point yet, but keep it in mind for the future.
 
I haven't had this issue before, but maybe try uninstalling drivers for Intel graphics if they're installed or disable Intel graphics as suggested above. It's weired that the GPUs would conflict if that is indeed the case, boo to whichever driver is at fault.
 
hmmm...

With the old card in (to see things) 1+2

1) Device manager and remove all old graphics card drivers (but that's only a Windows conflict, you would still be able to see the initial boot sequence)
2) BIOS restore to default, on all settings

Now put your new card in

3) Just triple check those power connectors, I think the Gigabyte card does come with 2x molex connectors in a packet? Try those. Your card might not be getting enough power. Cards are pretty straight forward, slot in, plug in and connect and play.. Just check all those connectors and clips etc.
4) Can you run an old DVI cable to it? Maybe it doesn't like your HDMI cable if you are using one, hell it could even be your screen. But changing a graphics card is a normally a quick 2 min job...

Other than that the best bet is to ask a friend who has a half decent PC that you can try your new card in. Hope its not blown, very rare as they are hardy.. The LED lights and fan doesn't mean the card is getting the required power or is working.

Good luck
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X