Sapphire HD 7850 1 GB not detected by the system

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Catpriest

Honorable
Apr 2, 2013
5
0
10,510
Hi all,

I recently bought a Sapphire HD 7850 1GB graphics card but I can not get it to work. It looks like it's not recognized by the system. I can boot my PC fine with the screen connected to the GPU of the motherboard, but when I then look at devicemanger or MSINFO32 it looks like the system has not recognised anything but the GPU of the motherboard. There is no unknown device or HD 7850.

The 6-pin power cable (of a coolermaster 600 watt PSU) is connected and the fans are spinning. It is not the slot in itself because when I put my old graphics card (HD 5700) back in, it works fine.

I have also upgraded the bios to the newest version (0505) but to no avail. In the bios settings "PCI-E" is set as the primary graphics boot device.

My motherboard is a PN5-EM HDMI which has (I believe) a PCI express x 16 version 1.1 slot. There is a lot of conflicting information on this but I understand that for most cards (especially NVIDIA) they are all backwards compatible. But for the power-saving AMD cards for example I might experience compatibility issues.

What should I do?

Thanks!
 
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Catpriest

Honorable
Apr 2, 2013
5
0
10,510
I don't really have another PC to test it in unfortunately but I will see what I can do.

Can anyone confirm whether I have 1.1 or 1.0 on my motherboard? How can I check this?
 
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C

Catpriest

Honorable
Apr 2, 2013
5
0
10,510
I want back to the shop they tested it there and it worked fine.
So I bought a new motherboard and now it works fine for me as well.

Looks there was some incompatibility after all....
 
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