By these, can you parse a link to the card you have? If they are identical, then one link will suffice although please keep in mind that it's possible that the cards might have the same chip under the cooling block but they might be different SKU's.
Assuming you're in Crossfire, what is the make and model of your motherboard and it's BIOS version, the make and model of your PSU and it's age and the version for your OS?
Have you given MSI's afterburner a whirl as well?