Note that I've seen several people with Gigabyte 965 boards report no problems. So, you may be ok. I recently posted this thread talking about choosing a motherboard for my E4300 / Antec NeoHE / etc. build.
I called antec and they said check for a4 serial numbers? Also a blue sticker or no sticker means it should be fine. If it doesnt work they can RMA through them to get you the upgraded models.