Latest news are saying a little more about the Samsung Galaxy S7/S7 edge/S7edge+ hardware as follows:
4GB of RAM
Two storage options: 32GB or 64GB
Both the Galaxy S7 and Galaxy S7 edge will offer microSD slots (compatible with cards up to 200GB) and possess IP67 dust- and water-resistance certifications.
3000mAh and 3600mAh for the S7 and S7 edge, respectively (up from 2550mAh and 2600mAh).
Wireless charging time was revealed to be 2 hours for S7 and 2.2 hours for S7 edge.
SAMSUNG Exynos 8 Octa 8890, a system-on-a-chip based partially on an ARM reference design, and offering four high-performance 2.3GHz cores along with four power-efficient 1.6GHz cores (as well as an integrated cellular baseband modem, which will enable alleged LTE Category 9 throughput).
12 megapixels , coupled with an f/1.7 lens aperture was tipped as being especially capable in low light situations.