BIOS latest version?
Yes, updated via Live Update (MSI software).
With Sapphire HD6870 you should be aware in which one of the DVI-ports you are plugging in the cable. if you use a VGA to DVI adapter use the upper DVI port, if you are using a DVI cable use the lower DVI port.
I am using a VGA to DVI adapter, and have plugged in into the top DVI port.
Did you plug in the 8 pin pci-express power?.
Yes, the power supply is connected to the card.