Intel is planning to announce Core 2 Extreme in Q4 a quarter earlier than it planned. This will definitely put more oil on the fire and make Phenom FX's life a bit tougher.
Intel doesn’t give much details but it says that Yorkfield Quad core has FSB 1333 and 12 MB of L2 cache. It is supposed to run at a higher frequency than the current 3 GHz but Intel didn’t went out with the details.
Intel is up for a Q4 fight.