Yes and Yes. Remember, my GTX275 works in his motherboard, so his motherboard is just fine. His 9800 works in my motherboard, so his 9800 is just fine.. but put them together, and it just gives the VGA error. All cables are connected, and yes the fan is spinning. his card works fine, his motherboard is fine, but they don't work together. Up until that morning, they worked fine. he had the comp for about a year running flawlessly. Now they are seemingly incompatible.