Bugs with 512MB Sapphire HD 4870

I have a problem with my graphics card. This is a Sapphire 4870 512mb v2. When I launch an application 3d, big crash, error, blue screen, reboot or back windows with colors that have changed.

I thought this is just the problem of Sapphire bios but bios number and P/N does not match the site. I am even engage in without reflashing results. I tried the following bios:
-Bios on the official website of Sapphire
-Bios for Asus

No change after clean reinstallation of drivers (8.12/9.2/9.3) etc. ..

Have you an idea of the trouble, knowing that I have already tried to change the power supply, the rams, removed the OC changed the motherboard, therefore it is the graphics card that is in question.

I have almost the same problem as you except it will not display DVI direct.

Your graphic card is defective, I suppose. Try some different graphic card on your current system or try the same graphic card on some different system.

I just tested the card on another pc no worries! I put another card on my pc and the pc has a hard time booting. Therefore I think my pci-e port is itself defective.

Thanks any way for the help.