PC does not boot when GPU is plugged in. Dead GPU? Dead MOBO? Dead PSU?

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Rafiul27

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Jan 13, 2014
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hi, i bought a new graphics card, XFX AMD HD 7850 2gb. When i placed the card in to my motherboard, the fans and all the other components ran or lit up but during the boot, a few seconds after the splash screen there is like half a second flash of a blue screen error and the computer says it has to be repaired.

it then takes me to start up repair and gives ways i which to repair the operating system but the operating system is a fresh windows 7 64bit i just installed half an hour ago from my old pc. I also uninstalled any drivers under the display option in device managers after reinstalling windows 7 from my old pc to use on the new one.

(the motherboard i have now has no onboard graphics, so i had to use another pc to install windows 7 in it)

here is the bit im worried about:

when i take the two 6pin PCI-e power cables out of the GPU, windows boots and everything is normal. I'm worried the brand new XFX 7850 card is dead or i do not have enough power. my PSU is a Coolermaster 700w Thunder PSU. (surely 700W is enough and its a good brand)

I have come to the conclusion that it is one of the possible outcomes:

1. GPU dead on arrival
2. PSU does not have enough power which is unlikely
3. the motherboard is dead. (i cannot test as i cannot connect a monitor without the GPU as the motherboard has no onboard graphics to boot the system up.

Any advice would be extremely helpful. I've spent over 15 hours research and trying manual troubleshooting such as removing RAM, resetting the CMOS battery etc etc.
i'm fed up and have had enough.

thanks.
 
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Rafiul27

Honorable
Jan 13, 2014
77
1
10,645


hi, there is a second PXIe 2.0 slot wich runs at a slower speed than the main one. i have tried putting the card in there and booting but no luck.

i cannot even enter the bios, the splash image comes up with a large gigabyte logo and the instructions like f9 for boot order, del for bios settings etc etc. once i press del to access the bios, i get black screened. nothing is shown. the fans on my pc are running and everything.

so no i cannot access the BIOS at all with the monitor attached.
 
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Rafiul27

Honorable
Jan 13, 2014
77
1
10,645


i tried it in my old computer build and when i simply attached the two 6pin PCI-e power connectors from the PSU to GPU, the same error problem occurred as the BIOS didn't load and said windows had an error, when in fact it was a freshly installed windows 7 64bit ultimate edition. As soon as I removed the 2x6pin PCI-e blocks from the GPU, the computer boots normally with just the 7850 card slotted in the PCI express 2.0x16 slot.

so from testing it on my old computer setup, the problem is plugging 2x6pin PCI-e in to the GPU which makes the whole system fail, no BIOS just black screen and when windows trys to run, i get a flash of a blue screen error and the computer restarts.. it just loops the process over and over until i "fix it".
i highly doubt its the psu, its a 700w coolermaster thunder brand new, and the motherboard is a gigabyte GA-970A-DS3P also brand new.

this leads me to believe its:

A -lack of power from PSU
B - dead graphics card
[strike]C - motherboard was dead but i can cross this off because i have tested with my older gigabyte and the same problem reoccurs [/strike]
 
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Rafiul27

Honorable
Jan 13, 2014
77
1
10,645


First option:

get old graphics card and try that, if it works update BIOS to latest settings and install the GPU i originally bought. (cannot do as this is my first build)

Second option:

the GPU is still within its return period of 14days.
 
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