Windows phones must also have a minimum of 4GB of flash memory. And if they do have 4GB, they must have an SD card slot so the phone can be updated.
'Desktop' PCs are much more flexible
Naturally, the minimum storage requirements for Windows 10 PCs are greater: 16GB for a 32-bit version of Windows 10, and 20GB for the 64-bit version. Tablets and PCs must contain 1GB of memory for 32-bit versions, and 2GB for 64-bit versions, Microsoft said. DirectX 9 graphics or higher must be supported. All of the additional requirements for phones--earphone jacks, wireless, sensors and so on--are optional, probably reflecting the legacy desktop PC, where those may not be used.
Both Windows phones and PCs will ship with UEFI 2.3.1, the firmware interface that replaces a typical BIOS. Both phones and PCs will include the Trusted Platform Module (TPM) for security's sake.
Microsoft said it will offer a Windows Hardware Compatibility program, ensuring that a given PC will work with others running Windows 10, but that it won't be mandatory to ship a device. Products that pass Microsoft's testing, however, will be noted on its site.
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