The Snapdragon 678 features performance upgrades over the Snapdragon 675. While the 678 uses the same octa-core Kryo 460 CPU as the 675, the CPU is clocked higher in the new 678 chip, reaching 2.2GHz. The Adreno 612 GPU inside the Snapdragon 678 has gotten a performance boost, too.
Qualcomm is also touting the Snapdragon 678's camera capabilities. With the included Spectra 250L ISP, the Snapdragon 678 can capture triple camera photos up to 48MP. Support for features like 4K video recording, 5x optical zoom, and portrait mode are included, too, and the 3rd gen Qualcomm AI Engine enables features like low-light photos and laser autofocus for better images.
Also included with the Snapdragon 678 is a Snapdragon X12 LTE modem. While it doesn't include 5G connectivity, the 678 does support carrier aggregation that can get you 4G LTE speeds up to 600Mbps and uploads topping out at 150Mbps. Dual SIM Dual VoLTE is in there as well.
The new Snapdragon 678 supports FHD+ displays at a 60Hz refresh rate, DisplayPort over USB-C, and 8GB of RAM. Quick Charge 4+ tech is included to help you recharge your Snapdragon 678-powered phone more quickly, and there's Bluetooth 5.0, NFC, USB 3.1, and Wi-Fi 802.11ac support packed in, too. On the audio side, Qualcomm says that the Snapdragon 678 supports its TrueWireless Stereo Plus, Aqstic, and aptX audio technologies.
Qualcomm isn't saying when we can expect to see the first Snapdragon 678 devices arrive, but it seems likely that they'll begin hitting the market in 2021.