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# Capacity Information

## Hard Drive Capacity

The hard drive capacity shown by Windows is lower than that stated by the hard drive manufacturer due to a difference in calculation.

Manufacturer | Hard drive manufacturers use a decimal definition of 1 KB = 1,000 Bytes. 100 GB: 100,000 MB / 1,000 Bytes = 100 GB
Windows | Windows use the binary definition of 1 KB = 1,024 Bytes. 100 GB: 100,000 MB / 1024 Bytes = 97.6 GB

## RAM Capacity

RAM capacity shown by Windows may be lower than the actual capacity because the computer uses shared memory for BIOS and the integrated graphics card.

Due to BIOS using shared memory, 1,024 MB RAM may be reported as 1,022 MB or slightly less.

If the computer has integrated graphics card, 1,024 MB RAM may be reported as 1,022 MB or less than 1,000 MB.