Micron Abandoning 3D Xpoint in Favour for CXL
Recently, Micron announced that it is dropping the development of 3D Xpoint memory in favour of CXL. What is 3D Xpoint, what is CXL, and why is Micron changing tact?
What is 3D Xpoint memory?
3D Xpoint memory is a non-volatile memory technology that was developed by Intel and Micron. The technology, unlike NAND FLASH, allows for individual bits to be accessed which can provide it enhanced performance over NAND (which has to have entire blocks erased before bits can be altered).
The memory technology utilises bulk resistance to store data, and while the exact material used between bit lines has not been publicly stated, what is known is that the technology utilises Chalcogenide glass. The bits are arranged so that each bit has two metal connectors (top and bottom), and a current is passed through one of the connectors. The resistance of the channel is measured, and this indicates the state of the bit.
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