It certainly is in the UK and that list is a very short list. I almost made a mistake and was about to buy Samsung M471B1G73BH0-YK0 which is on the list but just in time say it was M471B1G73BH0-QK0 - a difference in one letter whatever that means, who knows. But after this experience better safe than sorry. I was trying to buy 1 8 gb so I could add another later. Now I think about it is not a good sign that a motherboard is so only compatible with such a short list when there are dozens of identical sounding chips. I wonder why the incompatibility. They all seem the same. And I'm hoping it really is just the memory!!
There is an advanced list - CMTL > Search > Tested Motherboard > Results - so are the chips on that list compatible?