Can something be wrong with my GPU?

[CrygenF100]

Ok so I am a first time custom pc builder so far my computer is able to boot up and run just fine with my intel i3 2120 processor with Intel HD2000 graphics but when ever I try to install my graphics card the monitor won't turn on.

Here are the steps I take:
1. Uninstall any display drivers (intel graphics)
2. Boot into safe mode and wipe any trace of the display driver using disk sweeper
3. Wipe any registries using CC cleaner
4. Go into bios and set primary display boot to PEG(PCI Express graphics)
5. Disconnect the power, ground my self and install the GPU (XFX HD6870)
6. Connect the monitor cable to the GPU and boot up

Then this is where nothing happens. Even when I swap the cable(for the monitor) between the GPU and the motherboard nothing shows on screen. But when I shut down the pc and remove the power cables(the PSU cables leaving the GPU connected to the motherboard) and have the monitor cable attached to the GPU there is a display on the screen(plus a loud jet engine noise from the fan running at full speed) and I can login, detect my XFX radeon card and install drivers and even overclock it. This is the only condition it will work under(kind of) and even if I try setting it up normally with the AMD drivers preinstalled nothing appears on the screen but the system boots.

Special note: I did manage to get the GPU working with it set up properly(everything connected properly) at one point and managed to install the graphics driver but on the reboot, due to the drivers, the display stop working again. I'm not sure how I managed this but it only seemed to work for one boot but then on the next reboot the display refused to show.

I'm not sure what I am doing wrong here but I know it can be the fault of any of the components or even any mechanical damage done by me to the GPU since I took extra care installing it. Could it be that the card is obviously faulty and I can claim for a new one or do I have to prove its faulty or I am doing something obviously wrong?

 

[Defy Belief]

Even when I swap the cable between the GPU and the motherboard nothing shows on screen. But when I shut down the pc and remove the power cables from the PSU to the GPU and have the cable attached to the GPU there is a display on the screen(plus a loud jest engine noise from the fan running at full speed) and I can login, detect my XFX radeon card and install drivers and even over clock it. This is the only condition it will work under(kind of) and even if I try setting it up normally with the AMD drivers preinstalled nothing appears on the screen but the system boots.

I'm confused.

so what have you got plugged into your graphics card when it works?

 

[CrygenF100]

My GPU is installed on the the motherboard so I assume it draws power from the board but the card also requires extra power from the PSU. When I don't attach the cables from the PSU everything works but the fan spins insanely fast.

 

[Defy Belief]

What psu do you have? When you say take the cable out of the gpu into the motherboard are you referring to the power cable or the display cable?

 

[CrygenF100]

The PSU is a Corsair Builder Series CX 430W V2. I had to get a pcie 6 pin adapter but based on research on the internet and in that special case which i refer to in my special note I know that it definitely provides enough power to run the whole system. When I was talking about the cable I was referring to the monitor cable(sorry for any poor explanation there I will make an edit). I know that if you use the GPU you want to plug in the monitor cable into the graphics card.

 

[Orcvader]

So you can't even see BIOS?

On the other hand, that seems a lot of steps to get rid of the Intel drivers first beforehand, I found using any sort of driver cleaner when you're changing GPUs from one team to another (in your case, Intel to AMD) can mess up the install. All you had to do was uninstall the Intel one in Control Panel, then go into BIOS, disable the onboard, add in the discrete GPU, turn on and install drivers.

Also, the 6870 needs 2 6 pin connections, I'm assuming that's why you got the adapter though, to cover the 2nd 6 pin connection. What adapter is it?

And lastly, rules states sigs to be 4 lines max, so your sig is too big .

 

[MeMeMeMe]

Edit: didn't read properly.

Have you checked in bIOS to see if there's an option to switch between integrated graphics and discrete GPU? If the promise is happening on a reboot, it may be that it's autoswitching back to onboard graphics for some reason.

 

[CrygenF100]

Thanks for the heads up

 

[CrygenF100]

Followed all your instructions to the dot and still no display. I think the card is just faulty.