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Compression Attached Memory Module (CAMM) is a memory module form factor which uses a land grid array, and developed at Dell by engineer Tom Schnell as a replacement for DIMMs and SO-DIMMs which use edge connectors and had been in use for about 25 years. [1]
Two types of DIMMs (dual in-line memory modules): a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). Memory modules of SK Hynix. In computing, a memory module or RAM stick is a printed circuit board on which memory integrated circuits are mounted.
The unit is equipped with 1 GB of 1066 MHz DDR3 SDRAM soldered to the motherboard and a SO-DIMM slot which allows an upgrade to 2 GB or 3 GB. The netbook has a 160 GB, 250 GB, or 320 GB SATA hard drive @ 5,400 RPM.
A 16GB [1] DDR4 SO-DIMM module by Micron. DDR4 memory is supplied in 288-pin dual in-line memory modules (DIMMs), similar in size to 240-pin DDR3 DIMMs. DDR4 RAM modules feature pins that are spaced more closely at 0.85 mm compared to the 1.0 mm spacing in DDR3, allowing for a higher pin density within the same standard DIMM length of 133.35 mm ...
PC133 refers to SDR SDRAM operating at a clock frequency of 133 MHz, on a 64-bit-wide bus, at a voltage of 3.3 V. PC133 is available in 168-pin DIMM and 144-pin SO-DIMM form factors. PC133 is the fastest and final SDR SDRAM standard ever approved by the JEDEC, and delivers a bandwidth of 1.066 GB per second ([133.33 MHz * 64/8]=1.066 GB/s).
8 GB (soldered on-board) Optional: 16 GB: 8 GB (two 4 GB, non-user-accessible AASP Installable Slot) Optional: 16 GB, expandable to 32 GB with third-party modules. 1600 MHz PC3-12800 DDR3 SO-DIMM SDRAM 1600 MHz PC3-12800 LPDDR3 SDRAM (soldered on-board) 1867 MHz PC3-14900 LPDDR3 SDRAM (soldered on-board) 2133 MHz DDR4 Video card
Low-Power Double Data Rate (LPDDR), also known as LPDDR SDRAM, is a type of synchronous dynamic random-access memory (SDRAM) that consumes less power than other random access memory designs and is thus targeted for mobile computing devices such as laptop computers and smartphones.
The ThinkPad T440 builds on a thinner design with soldered 15 W fourth generation Intel Core processors that are noticeably slower that 35 W third-generation processors. Other changes include 4 GB of soldered memory accompanied by one SO-DIMM slot for expansion, as well as an M.2 2280 slot replacing the mSATA slot.