Your computer supports a maximum of 16 or 32 GB of memory; however, 32-bit operating systems, can only use a maximum of 4GB of address space. Moreover, certain components within the computer require address space in the 4GB range. Any address space reserved for these components cannot be used by computer memory; therefore, the amount of memory available to a 32-bit operating system is less than 4GB.
Greater than 4GB memory requires a 64-bit operating system
Only memory type supported: DDR4 SDRAM
Not backward compatible with DDR3 memory modules
Table 1. Memory specifications for Latitude 7290 and 7390 The following table lists the memory configuration:
Memory
Latitude 7290 and 7390 series
SO-DIMM Slot
One
Minimum memory configuration
4 GB
Maximum memory configuration
16 GB
DIMM configuration
4G 2400MHz DDR4 (1x4GB)
Yes
8G 2400MHz DDR4 (1x8GB)
Yes
16G 2400MHz DDR4 (1x16GB)
Yes
Table 2. Memory specifications for Latitude 7490 The following table lists the memory configuration:
Memory
Latitude 7490 series
SO-DIMM Slot
Two
Minimum memory configuration
4 GB
Maximum memory configuration
32 (16 x2 ) GB
DIMM configuration
4G 2400MHz DDR4 (1x4G)
Yes
8G 2400MHz DDR4 (2 X 4G)
Yes
8G 2400MHz DDR4 (1 X 8G)
Yes
16G 2400MHz DDR4 (2x8G)
Yes
32G 2400MHz DDR4 (2x16G)
Yes
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