With the Galaxy S9 phones, the focus was on improving the camera. To that end, Samsung unveiled the ISOCELL Fast 2L3 image sensor with on-board DRAM and 960fps video recording. The new ISOCELL Fast 2L3 sensor has a 3-layer design. Usually, the first layer holds the pixels that capture light, the second layer converts that into a digital information to be sent to the chipset for processing and finally to the phone's RAM. Samsung has added a third layer, 512MB DRAM, that can quickly read and store the data from the sensor - much faster than the chipset can. This enables 1080p video...
Source: https://www.gsmarena.com/samsungs_new_isocell_sensor_has_onboard_dram_shoots_960fps_video-news-29825.php
