Key Features. Two built-in M.2 2280 NVMe SSD slots permit cache acceleration without occupying storage drive bays. Intel dual-core processor with AES-NI hardware encryption engine; over 226 MB/s sequential read & 225 MB/s sequential write throughput.2 GB DDR4 memory (expandable up to 6 GB) Average 15% performance boost to photo indexing & other computing-intensive operations as well as database response time High Performance NAS with SSD Cache Acceleration Capability Synology DS420+ is designed for IT enthusiasts & home users. Equipped with a 2-core processor & built-in M.2 NVMe 2280 SSD slots for cache acceleration DS420+ is ideal for data sharing video streaming & photo indexing. Boost Performance with Built-In SSD Slots DS420+ provides two built-in M.2 SSD slots so that you can take full advantage of Synology SSD Cache functionality. Add SSD cache for up to 20 times faster I/O response without using front drive bays. Accelerate Demanding Applications A more powerful CPU speeds up computing-intensive applications. The new 2-core processor boosts photo indexing database response times & web PHP response efficiency. Easily categorise your photo memories smoothly manage files across computers & mobile devices & enjoy blazing fast web applications. Access & Sync Your Files Seamlessly Synology Drive provides a built-in universal portal to access your data anytime & anywhere & synchronize all your files across platforms including Windows mac OS Linux Android & i OS..