CPU World dug up some new information about the upcoming Athlon X4 880K processor from AMD. This quad-core chip will have a 4GHz clockspeed and a 95W TDP:
The linked CPU support page provides the following information about the Athlon X4 880K microprocessor: 4 GHz clock speed, 95 Watt TDP and a part number of AD880KXBI44JC. The 4GHz clock rate is 100 MHz higher than the 870K base clock, but 100 MHz lower than the A10-7890K. Decoding AD880KXBI44JC part number gives us a few extra details about the 880K.
The "KX" letters refer to FM2+ compatible package and 95 Watt power envelope. The "44" digits stand for 4 CPU cores and 4 MB of level 2 cache. The "JC" tells us that the CPU is based on a new "Godavari" stepping. Unfortunately, the support page does not specify maximum Turbo Core frequency.
This chip may be launched alongside the A8-7690K and A10-7890K, which are basically A8-7670K and A10-7870K APUs with a slightly higher clockspeed.