ValueRAM 64M x 64-bit (512MB) DDR2-667 CL5 SDRAM (Synchronous DRAM) memory module. The components on this module include eight 64M x 8-bit (16M x 8-bit x 4 Bank) DDR2-667 SDRAM in FBGA packages. This 240-pin DIMM uses gold contact fingers and requires +1.8V.

HyperX HX421C14FB/4 is a 512M x 64-bit (4GB) DDR4-2133 CL14 SDRAM (Synchronous DRAM) 1Rx8, memory module, based on eight 512M x 8-bit FBGA components per module. Each module kit supports Intel® Extreme Memory Profiles (Intel® XMP) 2.0. Each module has been tested to run at DDR4-2133 at a low latency timing of 14-14-14 at 1.2V. Additional timing parameters are shown in the Plug-N-Play (PnP) Timing Parameters section below. The JEDEC standard electrical and mechanical specifications are as follows:

FEATURES/BENEFITS >>Faster — improves speed of loading applications and system boot up >>Reliable — with no moving parts, solid-state drives are less likely to fail than standard hard drives >>Economical — design optimized to make migrating to an SSD more affordable >>Convenient — all-in-one kits with all the components for easy installation >>Multiple capacities — to fit your workload >>Form factor — 2.5-inch drive available in 7.0mm with adapter to fit in 9.5mm systems >>Silent — runs silent and cool