Please share with us the computer make/model or is custom built all the information on this build such as motherboard make/model, CPU, RAM, HDD, OS, etc?
I have an ASUS Intel Socket 775 P5Q Deluxe Motherboard that has a similar blat that otherwise works perfectly fine. And the most confusing part is that there is no riser for this board. I was given this motherboard for free from a friend, and stuffed a Pentium E5400 2.7Ghz dual-core into it. It is just at the POST that you see this message for about 3 seconds., but it gets past this and runs without any problems Windows 7 64-bit.
Does your computer otherwise work perfectly fine and its just a POST message annoyance?