Today Qualcomm announced the Snapdragon 800, which implements four Krait 400 cores running at up to 2.3GHz, an Adreno 330 GPU and Qualcomm's 3rd generation LTE baseband (9x25) all on a single die. Snapdragon 800 is the part formerly (or still internally) known as MSM8974 which we've seen rumblings about numerous times.
Qualcomm tells us that the Adreno 330 will offer roughly 50% more graphics performance over Adreno 320, and an almost 2x increase in compute performance.
The integrated 9x25 3rd generation LTE baseband enables support for UE Category 4 LTE with up to 150Mbps downstream, this is the same IP block as in MDM9x25, and likewise MSM8974/Snapdragon 800 will be available in all the usual variants (CDMA2000/WCDMA/LTE, WCDMA/LTE, and finally no modem).
Snapdragon 800 also integrates 802.11ac baseband, a new feature of modern Qualcomm SoCs, just like 8960 and the previous S4 family.
Snapdragon 800 also includes a 2x32 LPDDR3 memory interface.
On the video/decode side, the SoC supports encode/decode of 4K HD content at 30 fps. ~ AnandTech