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Samsung Semiconductor proposed an LPDDR4 variant that it called LPDDR4X. [22]: 11 LPDDR4X is identical to LPDDR4 except additional power is saved by reducing the I/O voltage (Vddq) from 1.1 V to 0.6 V. On 9 January 2017, SK Hynix announced 8 and 16 GB LPDDR4X packages. [23] [24] JEDEC published the LPDDR4X standard on 8 March 2017. [25]
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
DDR4 RAM operates at a voltage of 1.2 V and supports frequencies between 800 and 1600 MHz (DDR4-1600 through DDR4-3200). Compared to DDR3, which operates at 1.5 V with frequencies from 400 to 1067 MHz (DDR3-800 through DDR3-2133), DDR4 offers better performance and energy efficiency .
On DDR3 and DDR4 DIMM modules, this chip is a PROM or EEPROM flash memory chip and contains the JEDEC-standardized timing table data format. See the SPD article for the table layout among different versions of DDR and examples of other memory timing information that is present on these chips.
DDR4-3200 LPDDR4X-4267 Yes $490 1185G7E vPro No $431 Core i5 1145GRE vPro 1.1 GHz 1.5 GHz 2.6 GHz 4.1 GHz 80 1.30 GHz 8 MB Yes $362 1145G7E vPro No $312 Core i3 1115GRE: 2 (4) 1.7 GHz 2.2 GHz 3.0 GHz 3.9 GHz UHD 48 1.25 GHz 6 MB DDR4-3200 LPDDR4X-3733 Yes $338 1115G4E: No $285 Celeron 6305E: 2 (2) — 1.8 GHz — — 4 MB No $107
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