GIGA-PE667 Chipset Fan Problem?!

From the MOBO picture posted on gigabyte's official site,
U can clearly saw a fan on northbridge chipset.
BUT, I saw only a heatsink without fan on my PE667!!
Dose I buy a fake MOBO?

Sometimes they put different heatsinks and/or fans on the northbridge in pre-production. Actually, most mobos still use passive heatsinks without fans. Usually you can easily install a cheap 40mm fan onto the heatsink if you want, that's what I usually do.