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The first DDR4 memory module prototype was manufactured by Samsung and announced in January 2011. [a] Physical comparison of DDR, DDR2, DDR3, and DDR4 SDRAM Front and back of 8 GB [1] DDR4 memory modules. 2005: Standards body JEDEC began working on a successor to DDR3 around 2005, [14] about 2 years before the launch of DDR3 in 2007.
The DDR4 SDRAM is a high-speed dynamic random-access memory internally configured as 16 banks, 4 bank groups with 4 banks for each bank group for ×4/×8 and 8 banks, 2 bank groups with 4 banks for each bank group for ×16 DRAM. The DDR4 SDRAM uses an 8n prefetch architecture to achieve high-speed
It is for this reason that DDR3-2666 CL9 has a smaller absolute CAS latency than DDR3-2000 CL7 memory. Both for DDR3 and DDR4, the four timings described earlier are not the only relevant timings and give a very short overview of the performance of memory. The full memory timings of a memory module are stored inside of a module's SPD chip.
The laptop uses DDR4 RAM which can be upgraded to 32 GB and has one M.2 slot for an SSD and one M.2 slot for a wireless card. The screen was improved by switching from a TN to IPS LCD. 7577 [ 77 ] — The 2018's model changes the styling of the fan and speaker grills from the Inspiron 15 7000 Gaming (7567).
The standards specify the physical and electrical characteristics of the modules, and include the data for computer simulations of the memory module operating in a system. [10] Memory modules of the DDR2-SDRAM type are available for laptop, desktop, and server computers in a wide selection of capacities and access speeds.
The L series was designed to improve on the features of the R series laptops. [7] L-series laptops were reputed to increase performance over the R series by 150% and improve boot and shutdown times on Windows by 57%. [7] The laptop chassis was also 11% thinner and 12% lighter than the R-series models it was introduced to replace. [7]