Official GIGABYTE Forum
Questions about GIGABYTE products => Motherboards with AMD processors => Topic started by: nedge2k on April 16, 2012, 10:09:58 am
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Bought the GA-A75M-D2H to run two monitors then had a need to run three so bought a 6450 gfx card to crossfire with the A8-3850 APU - although in order to use onboard and pci gfx ports, the crossfire is disabled in CCC.
The monitors are 2xVGA and 1x DVI.
Problem is, no matter how I set things up in the BIOS, it refuses to output via the onboard VGA/D-SUB with the gfx card installed but will output on the onboard DVI. Is there something I'm missing?
The gfx card is, like the motherboard, DVI-D and has no displayport (none of the 6450 cards seem to) so I need to be able to use both the VGA/D-SUB on the mobo and the card to run the monitors I have. Buying a displayport card or a new monitor is out of the question and a powered VGA splitter is not suitable as the two VGA monitors are different aspect ratios.
BIOS: ver. F5, all drivers up to date etc. etc.
CPU: AMD A8-3850
GFX: Asus EAH6450
RAM: Corsair 8GB (2X4GB) DDR3 1866Mhz Red Vengeance (on the supported list)
PSU: 430w corsair
Other: TP-Link PCI-E Wi-Fi, PCI dual serial, WB Sata III HDD, USB3.0 card reader (connected to mobo header), Sata DVD-RW
Help!
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If you are trying to use three monitors in Eyefinity mode then you are out of luck as a Display Port is essential. To run Crossfire both cards must be the same anyway or at least the same series.
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I think you've missed the point here.
I am not trying to use Eyefinity as none of the 6450 card have displayport - I knew that when I bought it.
I am trying to run 2xVGA/D-Sub and 1xDVI from a combination of the onboard and PCI-E graphics but it is not working.
If I wanted to run 2xDVI and 1xVGA/D-SUB it would work.
My question is why will the mobo only output on DVI with a PCI-E gfx card installed and not VGA/D-SUB also? Without the PCI-E card it will output on both at the same time. With the card installed, VGA/D-SUB gets disabled but DVI works.
This must be a bug in the BIOS because other motherboards support this and it is not mentioned in the manual that VGA would be disabled if a PCI-E card was installed.
Is there someone technical you could refer this to?
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GGTS is available here:
GGTS http://ggts.gigabyte.com/
http://uk.gigabyte.com/support-downloads/support-downloads.aspx
Please expect several days for a reply.
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yeah its been a few days already - i really need an answer on this or i have to send the gfx card back and sort something else out.
this should just work, i don't understand why they would only allow onboard dvi and not vga also when a pci-e card is installed.
asrock have an faq about it: http://www.asrock.com/support/qa/TSDQA-88.pdf
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Are you using an adapter on the problematic port ?
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nope, straight vga-to-vga.
(...and yes the itself monitor works fine, as tested on the pci-e vga port)
I don't know if you have some way of contacting the ggts people directly but if you do, could you give them a poke? the question number is 1210250
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I will contact them, but that isn't to say that they will take any more notice of me that they are of you. Still it never hurts to try. ;) I will post if I hear anything back.
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cheers dude :)
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To update this:
After a lot of back and forth with GGTS, it turns out the Asus graphics card was at fault. I replaced it with another 6450 card (Gigabyte GV-R645OC-1GI) and it all worked straight away.
So the lesson here is, always by your mobo and gfx from the same manufacturer :P